symtab: fix getting CRC in relocatable modules am: 500c5b7305 am: 49631017a6

Original change: https://android-review.googlesource.com/c/platform/external/libabigail/+/2400497

Change-Id: I1041697902eaaab0d83c21473d00bd8a5dbe4902
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>