Don't warn on duplicate files in merge_zips if they have identical
CRC32 and size values.
Test: m checkbuild
Test: merge_zips_test.go
Change-Id: I61336ca4d4d3b7402c24a7abd337bd350fe10930
merge_zips -stripFile was only considering the name of the file and
ignoring the path. Make it more useful by supporting blueprint style
globs. The previous behavior can be recreated by prefixing with **/.
Bug: 111389216
Test: m checkbuild
Change-Id: I25760fe3f1f77704dd9da9d107d9a38a415d681f