[msan] Add new MSan callbacks for instrumentation-with-calls mode.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@206584 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Missing declarations for the new interface functions.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@206586 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Run msan_test in the new with-calls mode.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@206587 91177308-0d34-0410-b5e6-96231b3b80d8