[CFT] Experimental gcc update

[Pedro Giffuni]

Hi;

Apparently Google has an enhanced gcc distribution for Android [1] and I 
found a series of interesting patches there. Most of the patches are 
backports of patches produced by Google employees and submitted to the 
FSF. The license hasn't been changed from the GPLv2.

While gcc doesn't have much a future in base, improving our old compiler 
is still good for some tier-2 platforms and for 9.x.

The readme file was very useful to dig some GCC pre-4.3  bug reports and 
patches that have already been committed to -current. The remaining 
changes are here:

http://people.freebsd.org/~pfg/patches/gcc/gcc-google.patch

My kernel survived the initial round of testing but I have no hurry to 
commit it so more testers are welcome.

Regards,

Pedro.

[1] https://android.googlesource.com/toolchain/gcc/+/master/gcc-4.2.1/