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/os-specific/darwin/moltenvk/gitRevHeaderStability.patch

@@ -0,0 +1,14 @@
+diff --git a/Scripts/gen_moltenvk_rev_hdr.sh b/Scripts/gen_moltenvk_rev_hdr.sh
+index c49ea4e6..9b7d13d1 100755
+--- a/Scripts/gen_moltenvk_rev_hdr.sh
++++ b/Scripts/gen_moltenvk_rev_hdr.sh
+@@ -2,7 +2,7 @@
+
+ # Record the MoltenVK GIT revision as a derived header file suitable for including in a build
+ MVK_GIT_REV=$(git rev-parse HEAD)
+-MVK_HDR_FILE="${BUILT_PRODUCTS_DIR}/mvkGitRevDerived.h"
++MVK_HDR_FILE="@@sourceRoot@@/outputs/include/mvkGitRevDerived.h"
++mkdir -p $(dirname ${MVK_HDR_FILE})
+ echo "// Auto-generated by MoltenVK" > "${MVK_HDR_FILE}"
+ echo "static const char* mvkRevString = \"${MVK_GIT_REV}\";" >> "${MVK_HDR_FILE}"
+-