[PATCH] ARM: replace branches to undefined weak functions with NOP

[Leny Kholodov]

Hi shankar.easwaran, Bigcheese,

According to the code model (ARM, Thumb, Thumb2) this patch updates the b/bl/blx 0 instructions with NOP.

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D8807

Files:
  lib/ReaderWriter/ELF/ARM/ARMRelocationHandler.cpp
  test/elf/ARM/weak-branch.test

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