Disable llvm generating 128-bit multiply libcalls on 32-bit ARM

Disable llvm generating 128-bit multiply libcalls on 32-bit ARM

Merge commit 789708617d20 from llvm git (Koutheir Attouchi):

  Do not generate calls to the 128-bit function __multi3() on 32-bit ARM

  Re-applying this patch after bots failures. Should be fine now.

  The function __multi3() is undefined on 32-bit ARM, so a call to it should
  never be emitted. Instead, plain instructions need to be generated to
  perform 128-bit multiplications.

  Differential Revision: https://reviews.llvm.org/D103906

Reported by:	mmel
MFC after:	3 days