Fix for xcode scheme containing multiple testable targets.

[serges147]

Currently (in 2.3.0) it's impossible to slather multiple build action entries of a scheme - only the first one is processed.

[coveralls]

Coverage decreased (-0.1%) to 95.047% when pulling 042dbbf on serges147:master into e56129a on SlatherOrg:master.

[coveralls]

Coverage increased (+0.08%) to 95.273% when pulling db78707 on serges147:master into e56129a on SlatherOrg:master.

[serges147]

I believe that it will fix issues#96

[serges147]

Please let me know if I need to do some extra steps so that my pull request will be considered - I'm bit new-baby to world of open-source contribution ;) Thanks!

[ksuther]

This looks reasonable to me. I tried it out on my own project and it included all the test targets without any complaint.

[serges147]

@ksuther , can you please merge this PR as well? Our project really depends on this - we have one cumulative (workspace) scheme (called "All_Unit_Tests") which includes several test targets from different projects included into the workspace. So, we are looking forward get this in upcoming release as well. Thanks!

[ksuther]

Done, thanks for the changes!

I keep thinking that slather could use a reworked system for finding and matching binaries, which might involve throwing out some of this. Better to have it added now though, and having the tests for the future is valuable as well.