Read function names from C source files.
Read function names from C source files.

In mkerr.pl read parse functions names in C source files and use
them for translation and sanity checks.

Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>

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