Add --gcov-options '\-lp' to coverage
Add --gcov-options '\-lp' to coverage

Should result in more accurate header file coverage, see
https://github.com/eddyxu/cpp-coveralls/issues/54

Reviewed-by: Kurt Roeckx <bb87b47479d83cec3c76132206933257ded727b2@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl