Restore "Check if current ld.config.txt files is backward compatible"

This reverts commit bd2b0c78.

Reason for revert:
Solved the build error on mac_sdk build by using python2

Bug: 112738739
Bug: 111417344
Test: make ld.config.txt

Change-Id: Ic5a3ed2e6b091813c0310f859b7d20935514a7c6