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/applications/graphics/openimageio/2539_backport.patch

@@ -0,0 +1,31 @@
+diff --git a/src/libOpenImageIO/exif.cpp b/src/libOpenImageIO/exif.cpp
+index 10b75c21..0287d9c5 100644
+--- a/src/libOpenImageIO/exif.cpp
++++ b/src/libOpenImageIO/exif.cpp
+@@ -213,6 +213,9 @@ static const EXIF_tag_info exif_tag_table[] = {
+ 
+ 
+ 
++// libtiff > 4.1.0 defines these in tiff.h. For older libtiff, let's define
++// them ourselves.
++#ifndef GPSTAG_VERSIONID
+ enum GPSTag {
+     GPSTAG_VERSIONID = 0, 
+     GPSTAG_LATITUDEREF = 1,  GPSTAG_LATITUDE = 2,
+@@ -237,6 +240,7 @@ enum GPSTag {
+     GPSTAG_DIFFERENTIAL = 30,
+     GPSTAG_HPOSITIONINGERROR = 31
+ };
++#endif
+ 
+ static const EXIF_tag_info gps_tag_table[] = {
+     { GPSTAG_VERSIONID,		"GPS:VersionID",	TIFF_BYTE, 4 }, 
+@@ -270,7 +274,7 @@ static const EXIF_tag_info gps_tag_table[] = {
+     { GPSTAG_AREAINFORMATION,	"GPS:AreaInformation",	TIFF_UNDEFINED, 1 },
+     { GPSTAG_DATESTAMP,		"GPS:DateStamp",	TIFF_ASCII, 0 },
+     { GPSTAG_DIFFERENTIAL,	"GPS:Differential",	TIFF_SHORT, 1 },
+-    { GPSTAG_HPOSITIONINGERROR,	"GPS:HPositioningError",TIFF_RATIONAL, 1 },
++    { GPSTAG_GPSHPOSITIONINGERROR,     "GPS:HPositioningError",TIFF_RATIONAL, 1 },
+     { -1, NULL }  // signal end of table
+ };
+