- Explicitly add the libwebm path as an include directory, and export
it to ensure the include path propagates to other builds depending
on libwebm.
- Disable clang/gcc warning extern-c-compat; it's triggered in Android builds
by built-in includes.
Change-Id: I631f5a6f3b50a73519ae436033257de7e25afb16
- Use .cc and .h everywhere.
- Update includes/include guards.
- Remove extra makefile targets necessitated by previous mix
of cpp/cc.
Change-Id: I7aad29152d4177937f8f42927c16c6572228c104
