This patch adds a call to ggc_free from va_gc::release, which is
called by vec_free. This restores the functionality of the old VEC_free
and reduces the memory footprint during compilation.

2013-07-11  Teresa Johnson  <tejohnson@google.com>

	* vec.h (struct va_gc): Move release out-of-line.
	(va_gc::release): Call ggc_free on released vec.

From-SVN: r200909