programUpToDate check in synchonizeHostData should ignore differences in library files that were injected by the compiler

[vladima]

Currently programUpToDate compares the set of root files provided by the host with the set of files in the program. This check might fail even set of files in the program have not changed because set of files in program is composed of root files unioned with injected library files. As a result we'll spend time rebuilding the program when really nothing has been changed.

The check should be updated to ignore differences that originate from injected files.