Merge "Make tmpfile() respect $TMPDIR." am: 17b2bae190

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2545855

Change-Id: Icd9defdb4580558c760216be011251820d4d975c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>