Fix the incremental task "test"

[theosotr]

Hello

This pull request fixes the specification of the gradle task test. This task depends on some test resources that are located in plugin/src/test/Resource and libxcode/src/test/Resource directories.

For example this test depends on the libxcode/src/test/Resource/security-find-identity-single.txt file.

This commit considers those directories as inputs of this task so that tests are triggered whenever there are updates to any of the dependent test resources.