Update MIPS toolchain for Chromium use.

+ pull in part of:
http://lists.busybox.net/pipermail/buildroot/2015-March/123387.html
to add fmaxf/fminf

+ pull in
http://git.uclibc.org/uClibc/commit/?id=a8dc90eaaa5e6474beac828558d969b1aafee4af
to add context methods

+ enable UCLIBC_SUSV3_LEGACY and UCLIBC_HAS_CONTEXT_FUNCS for
getcontext/setcontent

Change-Id: Idd244428e443d5efb3b899f1385c3d33c3d22d00
184 files changed