[Decompression] Fail gracefully when out of memory

This patch adds failing gracefully when running out of memory when
allocating a buffer for decompression.

This provides a work-around for:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3224

Differential revision: https://reviews.llvm.org/D37447

llvm-svn: 312526