Removed constraint for building tlsh_unittest only with GNU compilers.
Removed constraint for building tlsh_unittest only with GNU compilers.

pombredanne/tlsh,pombredanne/tlsh,pombredanne/tlsh,postfix/tlsh,pombredanne/tlsh,postfix/tlsh,postfix/tlsh,postfix/tlsh,postfix/tlsh,pombredanne/tlsh,postfix/tlsh,pombredanne/tlsh