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/r-modules/patches/RNifti.patch

@@ -0,0 +1,33 @@
+diff --git a/configure.ac b/configure.ac
+index 05e8a1e..2dcde81 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -17,16 +17,5 @@ CXXFLAGS=`"${R_HOME}/bin/R" CMD config CXXFLAGS`
+ CPPFLAGS=`"${R_HOME}/bin/R" CMD config CPPFLAGS`
+ LDFLAGS=`"${R_HOME}/bin/R" CMD config LDFLAGS`
+ 
+-# Checks for libraries.
+-ZLIB_FLAGS="-Izlib"
+-ZLIB_OBJECTS=`ls -1 src/zlib/*.c | sed 's/^src\///' | sed 's/\\.c$/\\.o/'`
+-AC_SEARCH_LIBS([inflate], [z], [
+-    ZLIB_FLAGS=""
+-    ZLIB_OBJECTS=""
+-])
+-
+-AC_SUBST(ZLIB_FLAGS)
+-AC_SUBST(ZLIB_OBJECTS)
+-
+ AC_CONFIG_FILES([src/Makevars])
+ AC_OUTPUT
+diff --git a/src/Makevars.in b/src/Makevars.in
+index 77da572..358cc1d 100644
+--- a/src/Makevars.in
++++ b/src/Makevars.in
+@@ -1,5 +1,5 @@
+-PKG_CPPFLAGS = -DNDEBUG -DHAVE_ZLIB -DUSING_R -DRNIFTI_NIFTILIB_DEDUPLICATE -I../inst/include @ZLIB_FLAGS@
++PKG_CPPFLAGS = -DNDEBUG -DHAVE_ZLIB -DUSING_R -DRNIFTI_NIFTILIB_DEDUPLICATE -I../inst/include
+ PKG_LIBS = @LIBS@
+ 
+ NIFTI_OBJECTS = znzlib/znzlib.o niftilib/nifti1_io.o niftilib/nifti2_io.o
+-OBJECTS = main.o zzz.o @ZLIB_OBJECTS@ $(NIFTI_OBJECTS)
++OBJECTS = main.o zzz.o $(NIFTI_OBJECTS)