Please update gcc-4.9 on buildds

[Steven Chamberlain <steven@pyro.eu.org>]

Hi,

GCC PR 61801 describes a compiler bug with wrong code being generated
for kernel mode or syscalls:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801

I don't know if it has caused any issues yet on kfreebsd - our kernels
are built with Clang - but this might potentially affect glibc builds.
The minimal testcase from the GCC PR can reproduce it on kfreebsd, and
seems to show that is is fixed in 4.9.1-2 in sid/jessie.

Please could the kfreebsd-* buildd chroots be updated to gcc-4.9 4.9.1-2
as a precaution?

Thanks,
Regards,
-- 
Steven Chamberlain
steven@pyro.eu.org