gc.sh support for multiple build Ids
gc.sh support for multiple build Ids

In case androidx-platform-dev and androidx-main generate different output messages

Bug: 167723349
Test: ./gc.sh 7294840 7294798

Change-Id: I0d2fdc5c5871d11b49b0e142ad0cb81895fbc8b7

androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx