Correct name of __aeabi_f2lz.

Patch contributed by Andrew Turner.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@172365 91177308-0d34-0410-b5e6-96231b3b80d8
Implement __aeabi_lcmp and ulcmp

Patch contributed by Andrew Turner.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@172366 91177308-0d34-0410-b5e6-96231b3b80d8