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/numba/cuda_path.patch

@@ -0,0 +1,79 @@
+diff --git a/numba/cuda/cuda_paths.py b/numba/cuda/cuda_paths.py
+index b9988bc..a642680 100644
+--- a/numba/cuda/cuda_paths.py
++++ b/numba/cuda/cuda_paths.py
+@@ -24,10 +24,7 @@ def _find_valid_path(options):
+ 
+ def _get_libdevice_path_decision():
+     options = [
+-        ('Conda environment', get_conda_ctk()),
+-        ('CUDA_HOME', get_cuda_home('nvvm', 'libdevice')),
+-        ('System', get_system_ctk('nvvm', 'libdevice')),
+-        ('Debian package', get_debian_pkg_libdevice()),
++        ('Nix store', get_nix_ctk('nvvm', 'libdevice')),
+     ]
+     by, libdir = _find_valid_path(options)
+     return by, libdir
+@@ -35,18 +32,16 @@ def _get_libdevice_path_decision():
+ 
+ def _nvvm_lib_dir():
+     if IS_WIN32:
+-        return 'nvvm', 'bin'
++        return 'bin',
+     elif IS_OSX:
+-        return 'nvvm', 'lib'
++        return 'lib',
+     else:
+-        return 'nvvm', 'lib64'
++        return 'lib64',
+ 
+ 
+ def _get_nvvm_path_decision():
+     options = [
+-        ('Conda environment', get_conda_ctk()),
+-        ('CUDA_HOME', get_cuda_home(*_nvvm_lib_dir())),
+-        ('System', get_system_ctk(*_nvvm_lib_dir())),
++        ('Nix store', get_nix_ctk(*_nvvm_lib_dir())),        
+     ]
+     by, path = _find_valid_path(options)
+     return by, path
+@@ -74,14 +69,12 @@ def _cudalib_path():
+     elif IS_OSX:
+         return 'lib'
+     else:
+-        return 'lib64'
++        return 'lib'
+ 
+ 
+ def _get_cudalib_dir_path_decision():
+     options = [
+-        ('Conda environment', get_conda_ctk()),
+-        ('CUDA_HOME', get_cuda_home(_cudalib_path())),
+-        ('System', get_system_ctk(_cudalib_path())),
++        ('Nix store', get_nix_lib_ctk(_cudalib_path())),
+     ]
+     by, libdir = _find_valid_path(options)
+     return by, libdir
+@@ -92,6 +85,22 @@ def _get_cudalib_dir():
+     return _env_path_tuple(by, libdir)
+ 
+ 
++def get_nix_ctk(*subdirs):
++    """Return path to nix store cudatoolkit; or, None if it doesn't exist.
++    """
++    base = '@cuda_toolkit_path@'
++    if os.path.exists(base):
++        return os.path.join(base, *subdirs)
++
++
++def get_nix_lib_ctk(*subdirs):
++    """Return path to nix store cudatoolkit-lib; or, None if it doesn't exist.
++    """
++    base = '@cuda_toolkit_lib_path@'
++    if os.path.exists(base):
++        return os.path.join(base, *subdirs)
++
++
+ def get_system_ctk(*subdirs):
+     """Return path to system-wide cudatoolkit; or, None if it doesn't exist.
+     """