Adjust version string

Instead of "(GCC <gcc-git-desribe>)" use just "<gcc-git-describe>".

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Proper release name handling

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Create arc-versions.sh for tag arc-2014.08-rc1