Use --disable-libatomic for gcc

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

author  Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
build script: enable gold
Makefile: use neon and armv7-a (cfX)
Makefile: add bunch of --disable-werror (cfX)
gdb: Disable simulator target and tui

Change-Id: If8a135c5b2fff4b422b2b26fea701c3ac09de7c9

Conflicts:
	Makefile.in