Fix CVE-2012-3509, an integer overflow in libiberty, leading to
heap-buffer overflow.
From Sebastian Trahm; OK deraadt@

Update libiberty to the version found in binutils 2.17.1 (which still
identifies itself as the gcc 3 version...)

Synch with gcc-3.3.2 version

And the includes are taken from GCC 2.95.pre3 test3