uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/python-modules/ocrmypdf/paths.patch

@@ -0,0 +1,127 @@
+diff --git a/src/ocrmypdf/_exec/ghostscript.py b/src/ocrmypdf/_exec/ghostscript.py
+index 1146cc5f..43f3915c 100644
+--- a/src/ocrmypdf/_exec/ghostscript.py
++++ b/src/ocrmypdf/_exec/ghostscript.py
+@@ -40,15 +40,7 @@ For details see:
+ # Most reliable what to get the bitness of Python interpreter, according to Python docs
+ _is_64bit = sys.maxsize > 2 ** 32
+ 
+-_gswin = None
+-if os.name == 'nt':
+-    if _is_64bit:
+-        _gswin = 'gswin64c'
+-    else:
+-        _gswin = 'gswin32c'
+-
+-GS = _gswin if _gswin else 'gs'
+-del _gswin
++GS = '@gs@'
+ 
+ 
+ def version():
+diff --git a/src/ocrmypdf/_exec/jbig2enc.py b/src/ocrmypdf/_exec/jbig2enc.py
+index 2e8a058b..65a09088 100644
+--- a/src/ocrmypdf/_exec/jbig2enc.py
++++ b/src/ocrmypdf/_exec/jbig2enc.py
+@@ -14,7 +14,7 @@ from ocrmypdf.subprocess import get_version, run
+ 
+ 
+ def version():
+-    return get_version('jbig2', regex=r'jbig2enc (\d+(\.\d+)*).*')
++    return get_version('@jbig2@', regex=r'jbig2enc (\d+(\.\d+)*).*')
+ 
+ 
+ def available():
+@@ -27,7 +27,7 @@ def available():
+ 
+ def convert_group(*, cwd, infiles, out_prefix):
+     args = [
+-        'jbig2',
++        '@jbig2@',
+         '-b',
+         out_prefix,
+         '-s',  # symbol mode (lossy)
+@@ -46,7 +46,7 @@ def convert_group_mp(args):
+ 
+ 
+ def convert_single(*, cwd, infile, outfile):
+-    args = ['jbig2', '-p', infile]
++    args = ['@jbig2@', '-p', infile]
+     with open(outfile, 'wb') as fstdout:
+         proc = run(args, cwd=cwd, stdout=fstdout, stderr=PIPE)
+     proc.check_returncode()
+diff --git a/src/ocrmypdf/_exec/pngquant.py b/src/ocrmypdf/_exec/pngquant.py
+index ca8a4542..d0544174 100644
+--- a/src/ocrmypdf/_exec/pngquant.py
++++ b/src/ocrmypdf/_exec/pngquant.py
+@@ -19,7 +19,7 @@ from ocrmypdf.subprocess import get_version, run
+ 
+ 
+ def version():
+-    return get_version('pngquant', regex=r'(\d+(\.\d+)*).*')
++    return get_version('@pngquant@', regex=r'(\d+(\.\d+)*).*')
+ 
+ 
+ def available():
+@@ -46,7 +46,7 @@ def input_as_png(input_file: Path):
+ def quantize(input_file: Path, output_file: Path, quality_min: int, quality_max: int):
+     with input_as_png(input_file) as input_stream:
+         args = [
+-            'pngquant',
++            '@pngquant@',
+             '--force',
+             '--skip-if-larger',
+             '--quality',
+diff --git a/src/ocrmypdf/_exec/tesseract.py b/src/ocrmypdf/_exec/tesseract.py
+index a3688f65..61f54465 100644
+--- a/src/ocrmypdf/_exec/tesseract.py
++++ b/src/ocrmypdf/_exec/tesseract.py
+@@ -75,7 +75,7 @@ class TesseractVersion(StrictVersion):
+ 
+ 
+ def version() -> str:
+-    return get_version('tesseract', regex=r'tesseract\s(.+)')
++    return get_version('@tesseract@', regex=r'tesseract\s(.+)')
+ 
+ 
+ def has_user_words():
+@@ -97,7 +97,7 @@ def get_languages():
+         msg += output
+         return msg
+ 
+-    args_tess = ['tesseract', '--list-langs']
++    args_tess = ['@tesseract@', '--list-langs']
+     try:
+         proc = run(
+             args_tess,
+@@ -119,7 +119,7 @@ def get_languages():
+ 
+ 
+ def tess_base_args(langs: List[str], engine_mode: Optional[int]) -> List[str]:
+-    args = ['tesseract']
++    args = ['@tesseract@']
+     if langs:
+         args.extend(['-l', '+'.join(langs)])
+     if engine_mode is not None:
+diff --git a/src/ocrmypdf/_exec/unpaper.py b/src/ocrmypdf/_exec/unpaper.py
+index aec365c2..cc5cb7e4 100644
+--- a/src/ocrmypdf/_exec/unpaper.py
++++ b/src/ocrmypdf/_exec/unpaper.py
+@@ -31,7 +31,7 @@ log = logging.getLogger(__name__)
+ 
+ 
+ def version() -> str:
+-    return get_version('unpaper')
++    return get_version('@unpaper@')
+ 
+ 
+ def _setup_unpaper_io(tmpdir: Path, input_file: Path) -> Tuple[Path, Path]:
+@@ -71,7 +71,7 @@ def _setup_unpaper_io(tmpdir: Path, input_file: Path) -> Tuple[Path, Path]:
+ def run(
+     input_file: Path, output_file: Path, *, dpi: DecFloat, mode_args: List[str]
+ ) -> None:
+-    args_unpaper = ['unpaper', '-v', '--dpi', str(round(dpi, 6))] + mode_args
++    args_unpaper = ['@unpaper@', '-v', '--dpi', str(round(dpi, 6))] + mode_args
+ 
+     with TemporaryDirectory() as tmpdir:
+         input_pnm, output_pnm = _setup_unpaper_io(Path(tmpdir), input_file)