Added a check_cache_validity argument to c_parser
Added a check_cache_validity argument to c_parser

Introduced a new flag for the parser that will skip the cache validity
checking. Without this the cache cannot be used without access to the
headers, which is not very practical if reusing the python wrapper on a
machine that only has access to the C library itself.

MatthieuDartiailh/pyclibrary,MatthieuDartiailh/pyclibrary