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/servers/sql/postgresql/patches/disable-resolve_symlinks-94.patch

@@ -0,0 +1,12 @@
+--- a/src/common/exec.c	2014-09-04 20:19:12.236057588 +0200
++++ b/src/common/exec.c	2014-09-04 20:19:50.550251633 +0200
+@@ -218,6 +218,9 @@
+ static int
+ resolve_symlinks(char *path)
+ {
++	// On NixOS we *want* stuff relative to symlinks.
++	return 0;
++
+ #ifdef HAVE_READLINK
+ 	struct stat buf;
+ 	char		orig_wd[MAXPGPATH],