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/compilers/teyjus/fix-lex-to-flex.patch

@@ -0,0 +1,25 @@
+diff --git a/source/OMakefile b/source/OMakefile
+index e6bd37e..1bbc0a8 100644
+--- a/source/OMakefile
++++ b/source/OMakefile
+@@ -184,6 +184,12 @@ DEP_MAIN = $(FNT)/dependfront
+ PAR_MAIN = $(FNT)/parsefront
+ 
+ ############################################################
++# Nixpkgs specific changes
++#
++
++LEX = flex
++
++############################################################
+ # Platform specific changes
+ #
+ 
+@@ -194,7 +200,6 @@ if $(mem $(SYSNAME), Linux)
+ 
+ if $(mem $(OSTYPE), Cygwin Win32)
+     YACC = bison -by
+-    LEX = flex
+     CC = i686-pc-mingw32-gcc
+     INC_C[] += $(INC)/byteswap $(INC)/search
+     export