tsan: remove meta from internal allocator
I am puzzled why it is even there.



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@214026 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: reduce internal allocator region from 16M to 1M
16M regions can waste almost 1G for nothing.
Since region size is used only during initial heap growth,
it's unclear why we even need such huge regions.



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@214027 91177308-0d34-0410-b5e6-96231b3b80d8