Fix yasm segfaults GNU assembler files on OS X

http://tortall.lighthouseapp.com/projects/78676/tickets/269
valkyrie: fix build mavericks
binutils: fix libiberty --enable-install-libiberty

Now libiberty works without gcc. Don't need 250 MB diskspace. Speedup
build

#{Formula['binutils'].lib}/x86_64/libiberty.a
mariadb: fast-mutex, brewed-openssl, maxkey 4000

* Replace mutexes with spinlocks (experimental)
* Build with Homebrew OpenSSL instead of bundled yassl
* Change max key length from 1000 to 4000