[msan] Remove CallocOverflow test.
[msan] Remove CallocOverflow test.

This behaviour depends on MSAN_OPTIONS.
All interesting combinations are covered by lit_tests/allocator_returns_null.cc.


git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@192691 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt