[AArch64] Fix miscompile of comparison with 0xffffffffffffffff

Some literals in the AArch64 backend had 15 'f's rather than 16, causing
comparisons with a constant 0xffffffffffffffff to be miscompiled.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221157 91177308-0d34-0410-b5e6-96231b3b80d8