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.patch

@@ -0,0 +1,16 @@
+# 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
+@@ -18,10 +18,7 @@ def default_buildinfo_environment_data():
+         ('distmod', '$MONGO_DISTMOD', True, True,),
+         ('distarch', '$MONGO_DISTARCH', True, True,),
+         ('cc', '$CC_VERSION', True, False,),
+-        ('ccflags', '$CCFLAGS', True, False,),
+         ('cxx', '$CXX_VERSION', True, False,),
+-        ('cxxflags', '$CXXFLAGS', True, False,),
+-        ('linkflags', '$LINKFLAGS', True, False,),
+         ('target_arch', '$TARGET_ARCH', True, True,),
+         ('target_os', '$TARGET_OS', True, False,),
+     )