cl/gcc-adapt-ext: __attribute__((unused)) is now marking unused params.
Merge branch 'extension/use-gcc-attributes-for-marking-unused-variables' into cl/gcc-adapt-ext
cl/gcc-adapt-ext: TYPE_OFFSET_BASETYPE(NODE) is now processed.

NOTE: To make sure the wrapping structural type is added to Code Storage
      in every possible situation.
Merge branch 'extension/OFFSET_TYPE-fix-for-TYPE_OFFSET_BASETYPE' into cl/gcc-adapt-ext