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/misc/luarocks/setup-hook.sh

@@ -0,0 +1,16 @@
+unpackCmdHooks+=(_trySourceRock)
+unpackCmdHooks+=(_tryRockSpec)
+
+_tryRockSpec() {
+    if ! [[ "$curSrc" =~ \.rockspec$ ]]; then return 1; fi
+}
+
+_trySourceRock() {
+    if ! [[ "$curSrc" =~ \.src.rock$ ]]; then return 1; fi
+
+    # luarocks expects a clean <name>.rock.spec name to be the package name
+    # so we have to strip the hash
+    renamed="$(stripHash $curSrc)"
+    cp "$curSrc" "$renamed"
+    luarocks unpack --force "$renamed"
+}