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/libraries/libiio/hardcode-library-path.patch

@@ -0,0 +1,38 @@
+diff --git a/bindings/python/iio.py b/bindings/python/iio.py
+index 5306daa..f8962ee 100644
+--- a/bindings/python/iio.py
++++ b/bindings/python/iio.py
+@@ -229,9 +229,9 @@ if "Windows" in _system():
+     _iiolib = "libiio.dll"
+ else:
+     # Non-windows, possibly Posix system
+-    _iiolib = "iio"
++    _iiolib = "@libiio@"
+ 
+-_lib = _cdll(find_library(_iiolib), use_errno=True, use_last_error=True)
++_lib = _cdll(_iiolib, use_errno=True, use_last_error=True)
+ 
+ _get_backends_count = _lib.iio_get_backends_count
+ _get_backends_count.restype = c_uint
+diff --git a/bindings/python/setup.py.cmakein b/bindings/python/setup.py.cmakein
+index cd14e2e..516c409 100644
+--- a/bindings/python/setup.py.cmakein
++++ b/bindings/python/setup.py.cmakein
+@@ -62,7 +62,7 @@ class InstallWrapper(install):
+             _iiolib = "libiio.dll"
+         else:
+             # Non-windows, possibly Posix system
+-            _iiolib = "iio"
++            _iiolib = "@libiio@"
+         try:
+             import os
+ 
+@@ -72,7 +72,7 @@ class InstallWrapper(install):
+                 fulllibpath = find_recursive(destdir, "libiio.so")
+                 _lib = _cdll(fulllibpath, use_errno=True, use_last_error=True)
+             else:
+-                _lib = _cdll(find_library(_iiolib), use_errno=True, use_last_error=True)
++                _lib = _cdll(_iiolib, use_errno=True, use_last_error=True)
+             if not _lib._name:
+                 raise OSError
+         except OSError: