RESTRICT AUTOMERGE Ignore weak symbol difference in libc++ ABI check am: ddcf30d384

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libcxx/+/18607875

Change-Id: Iaac3c5196d6bea5a86d05ee988454f7d5daef83a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>