Switch include path of header-abi-dumper headers

This commit switches the include path of header-abi-dumper clang headers
to `prebuilts/clang-tools/${os}-x86/clang-headers`.  This decouples the
cross git repositories dependencies.

Bug: 111579848
Test: development/vndk/tools/header-checker/utils/create_reference_dumps.py
Change-Id: I53083298ca7be39b3fbaffb123146c12c189e7c3