Add USE_GCC_RUNTIME to security/openssl
Add USE_GCC_RUNTIME to print/ghostscript.
Add USE_GCC_RUNTIME to graphics/netpbm.
Add USE_GCC_RUNTIME to lang/perl5 with a caveat.

When using USE_PKGSRC_GCC_RUNTIME, you must also use an external
perl when building gcc, else perl-depends-on-gcc-depends-on-perl.
Add USE_GCC_RUNTIME to sysutils/coreutils.
Add USE_GCC_RUNTIME to databases/postgresql91.
Add USE_GCC_RUNTIME to lang/ruby18-base
Add USE_GCC_RUNTIME to lang/ruby193-base
Add USE_GCC_RUNTIME to devel/nspr.
Add USE_GCC_RUNTIME to multimedia/ffmpeg
Add USE_GCC_RUNTIME to devel/libuuid
Add USE_GCC_RUNTIME to textproc/py-cElementTree.
Add USE_GCC_RUNTIME to textproc/py-expat.
Add USE_GCC_RUNTIME to devel/py-readline.
Add USE_GCC_RUNTIME to databases/py-sqlite3.
Add USE_GCC_RUNTIME to databases/ruby-sqlite3.
Add USE_GCC_RUNTIME to lang/tcl.
Add USE_GCC_RUNTIME to databases/tokyocabinet.
Add USE_GCC_RUNTIME to databases/tokyotyrant.
Add USE_GCC_RUNTIME to multimedia/xvidcore.