Fix test fenv fail with clang/mips -integrated-as

Cherry-pick 2 fixes to replace previous temp fixes
287eb376 and
63def0e5

  commit 9a05b98e
  Author: Akira Hatanaka <ahatanaka@mips.com>
  Date:   Mon Jul 22 19:30:38 2013 +0000

    [mips] Fix MipsAsmParser::parseCCRRegs.

    Enable parsing all 32 floating point control registers $0-31 and stop trying to
    parse floating point condition code register $fcc0. Also, return ParseFail if
    the operand being parsed is not in the expected format.

    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186861 91177308-0d34-0410-b5e6-96231b3b80d8

  commit 0b926427
  Author: Akira Hatanaka <ahatanaka@mips.com>
  Date:   Mon Jul 22 18:52:22 2013 +0000

    [mips] Use ADDu instead of OR to copy general purpose registers. Also, delete
    the InstAlias pattern which maps "move" to OR to resolve ambiguity in
    MatchTable.

    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186855 91177308-0d34-0410-b5e6-96231b3b80d8

Change-Id: Iad86b27f300551349f7f1accca5539a0cef42ab1