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/tools/analysis/splint/darwin.patch

@@ -0,0 +1,13 @@
+diff --git a/src/osd.c b/src/osd.c
+index ebe214a..4ba81d5 100644
+--- a/src/osd.c
++++ b/src/osd.c
+@@ -516,7 +516,7 @@ osd_getPid ()
+ # if defined (WIN32) || defined (OS2) && defined (__IBMC__)
+   int pid = _getpid ();
+ # else
+-  __pid_t pid = getpid ();
++  pid_t pid = getpid ();
+ # endif
+ 
+   return (int) pid;