Delete re_lexer.c file to force it to be build with new version
of flex, othwewise tests fail in some arches because of a bug
in older version of flex.

See: https://github.com/VirusTotal/yara/issues/771

* COLOR=0 (disabling tput) wasn't set for all make calls

Manually remove _http_parser.cpython-36m-x86_64-linux-gnu.so shared
object that is shipped in source code and make strip fails in not
x86 architectures.

Bug opened upstream: https://github.com/aio-libs/aiohttp/issues/2414