Fix cases where RSInvariant pass might miss marking some loads as invariant.

llvm-rs-cc and bcc can add numeric suffixes to structure type names; we need
to tolerate this when looking for the context structure by name.

Bug: 21815112
Change-Id: If5ef169245f8d43affdc43abb2298c7015568dd0
(cherry picked from commit 23c2bfe96698091f2886d1959435d8949f76c46b)
2 files changed