Brand gcc as "SM-Toolchain"

Change-Id: Ic909cdba380aad68f1afff1ae803f4cd6a4565c2
gcc: disable libquadmath
binutils: disable -werror
libbfd: disable -werror
enable libgomp
Revert "enable libgomp"

This reverts commit 9231ba65455ab1f46a65299c4326188125689fb7.
toolchain/build: Use --disable-libatomic for gcc

libatomic can't currently be built for Android, breaking
the gcc trunk (4.8) build process.

Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>

Conflicts:
	Makefile.in