gcc-4.7: Lower the internal consistency check level to release

This should help in speeding up compilation at the expense
of a bit less info when gcc ICEs but we dont get many gcc
ICEs and therefore using --enable-checking=release is
right balance

(From OE-Core rev: a84c097cc7c52a856601e546880440d9375b0e30)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/gcc/gcc-4.7.inc

@@ -81,6 +81,7 @@ EXTRA_OECONF_BASE = " --enable-lto \
 			--with-linker-hash-style=${LINKER_HASH_STYLE} \
 			--with-ppl=no \
 			--with-cloog=no \
+			--enable-checking=release \
 			--enable-cheaders=c_global "
 
 EXTRA_OECONF_INITIAL = "--disable-libmudflap \