[mips] Add instruction selection patterns for blez and bgez.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182396 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Rename option to make it compatible with gcc.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182397 91177308-0d34-0410-b5e6-96231b3b80d8
Regenerate configure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182401 91177308-0d34-0410-b5e6-96231b3b80d8