gcc32 may well be a 4.x version for a 32bit target, so add an additional check, hopefully not too strict.
Probe also gcc-3.3.6 to make Gentoo users happy.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3087 c046a42c-6fe2-441c-8c8c-71466251a162