RESTRICT AUTOMERGE Ignore weak symbol difference in libc++ ABI check am: ddcf30d384 am: 76927ad594 am: 015dc27cd7

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

Change-Id: I472bac56fbf2a40d84bfb760d136f1e93f160ddb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>