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/applications/science/misc/root/setup-hook.sh

@@ -0,0 +1,13 @@
+thisroot () {
+    # Workaround thisroot.sh dependency on man
+    if [ -z "${MANPATH-}" ]; then
+        MANPATH=:
+    fi
+    local oldOpts="-u"
+    shopt -qo nounset || oldOpts="+u"
+    set +u
+    source @out@/bin/thisroot.sh
+    set "$oldOpts"
+}
+
+postHooks+=(thisroot)