[sanitizer] make the allocator crash instead of returning 0 on huge size (controlled by the allocator_may_return_null flag)

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@190127 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] make calloc crash instead of returning 0 on overflow (controlled by the allocator_may_return_null flag)

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@190128 91177308-0d34-0410-b5e6-96231b3b80d8