[msan] Better diagnostic for invalid origin id.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@210331 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Partial revert of r210331.

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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@210332 91177308-0d34-0410-b5e6-96231b3b80d8