Patch lang/gcc47 to support multiarch and sngl.
Merge branch 'joyent/feature/sngl/2013Q2' into joyent/release/2013Q2_sngl

Conflicts:
	lang/gcc47/distinfo
	lang/gcc47/patches/patch-gcc_config_sol2-bi.h
	lang/gcc47/patches/patch-gcc_config_sol2.h