Merging r216064:
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    r216064 | kongyi | 2014-08-20 03:40:20 -0700 (Wed, 20 Aug 2014) | 9 lines
    
    ARM: Fix codegen for rbit intrinsic
    
    LLVM generates illegal `rbit r0, #352` instruction for rbit intrinsic.
    According to ARM ARM, rbit only takes register as argument, not immediate.
    The correct instruction should be rbit <Rd>, <Rm>.
    
    The bug was originally introduced in r211057.
    
    Differential Revision: http://reviews.llvm.org/D4980
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    llvm-svn: 216089