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/nosql/mongodb/forget-build-dependencies-4-2.patch

@@ -0,0 +1,36 @@
+# MongoDB keeps track of its build parameters, which tricks nix into
+# keeping dependencies to build inputs in the final output.
+# We remove the build flags from buildInfo data.
+--- a/site_scons/mongo/generators.py
++++ b/site_scons/mongo/generators.py
+@@ -33,30 +33,12 @@ def default_buildinfo_environment_data():
+             True,
+             False,
+         ),
+-        (
+-            'ccflags',
+-            '$CCFLAGS',
+-            True,
+-            False,
+-        ),
+         (
+             'cxx',
+             '$CXX_VERSION',
+             True,
+             False,
+         ),
+-        (
+-            'cxxflags',
+-            '$CXXFLAGS',
+-            True,
+-            False,
+-        ),
+-        (
+-            'linkflags',
+-            '$LINKFLAGS',
+-            True,
+-            False,
+-        ),
+         (
+             'target_arch',
+             '$TARGET_ARCH',