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/readline/android.patch

@@ -0,0 +1,16 @@
+diff --git histlib.h histlib.h
+index c938a10..925ab72 100644
+--- histlib.h
++++ histlib.h
+@@ -51,9 +51,9 @@
+ #endif
+ 
+ #ifndef member
+-#  ifndef strchr
++#  if !defined (strchr) && !defined (__STDC__)
+ extern char *strchr ();
+-#  endif
++#  endif /* !strchr && !__STDC__ */
+ #define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)
+ #endif
+