Another attempt at fixing sane-gcc-compiler

[Mike Duigou]

The previous patch (CR 6998016) which attempted to fix the incorrect ifdef nesting in the Sanity.gmk sane-gcc-compiler rule ran into a problem on 32 bit versions of solaris due to a previously unreported error in the use of REQUIRED_GCC_VERSION (which should have been REQUIRED_GCC_VER). The fixes for 6998012 and 6998016 were backed out temporarily to allow Oracle's internal integration process to continue.

I have now produced an updated webrev which includes the original fixes from 6998012 and 6998016 as well as a fix for the blocker problem on 32-bit solaris.

Please review http://cr.openjdk.java.net/~mduigou/7004205.0/webrev/

Thanks,

Mike