Decorate symlinks properly according to their git status

The Eclipse resource model handles a symlink to a folder like the
container it refers to but git status handles the symlink source like a
special file.

Change-Id: Ic3f6e0ba495c507951034b90807e915624d46432
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Merge "Decorate symlinks properly according to their git status" into stable-3.6