Fix the unit test for header-abi-dumper -print-resource-dir

The resource dir has been changed from lib64 to lib since clang-r468909.
build-prebuilts.sh creates lib in the dist dir so that developers can
easily run the binaries.

Test: development/vndk/tools/header-checker/android/build-prebuilts.sh
Test: development/vndk/tools/header-checker/tests/test.py
Bug: 255702405
Change-Id: I9bed6f0fd7948830a89d9e24889d9341ebf1a9c4
3 files changed