More portability fixes for Linux. -- make EpocEnginePathHelper et al produce an IPath that matches an existing path in the filesystem even if the case doesn't match. File#getCanonical* does not do this in Unix. -- SISBuilderInfo2 and bld.inf exports fixes for full path detection -- make some tests less dependent on having specific SDKs available. -- fix some warnings

# "featureName" property - name of the feature
featureName=Carbide.c++