Use working tree iterator to compare file modes

Add isModeDifferent method to WorkingTreeIterator
that compares mode with consideration of the
core.filemode setting in the config.

Bug: 379004
Change-Id: I07335300d787a69c3d1608242238991d5b5214ac
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
3 files changed