* longlong.h: Merge in changes from glibc.
Also don't clobber %g2 register in 32bit SPARC assembly, so that
-mno-app-regs libgcc can be compiled.
* libgcc2.c: Add defines so that the updated longlong.h
can be used in libgcc2.a. Also, make sure on most architectures
(at least on all which have optimized code in longlong.h defined
for) {SI,W}_TYPE_SIZE is suitable for preprocessor tests.
From-SVN: r30836
