[ncurses] Apply ncurses Clang patch on FreeBSD 10+

Clang is the default compiler on FreeBSD 10+...in case you didn’t GNU.
Ignore Rubocop's numeric literals style check
[openssl] Clang is the default compiler on FreeBSD 10+
[zlib] Compile with position independent code on FreeBSD
[ruby] Actually disable optional C level backtrace support

The previous attempt at using the `—-without-execinfo` flag does nothing.
[ruby] Workaround bad symbol in libtinfo.so on FreeBSD
Merge pull request #338 from opscode/schisamo/freebsd-10-fixes

FreeBSD 10 compat