Fix pthread#pthread_heap_allocated_stack for jemalloc. am: d25afca1cc

Original change: https://googleplex-android-review.googlesource.com/c/platform/bionic/+/22794431

Change-Id: I1e4a3e3cb8ab8c49cf33e11931450c3b13763dfd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>