Added missing image file and remove iOS target from C++ hello project

Fixed warnings related to missing icons for iOS demos

Update gradle builder version

Fixed ICE-7361 - Added mutex to prevent intertwined output

Android demo build updates'

Don't use deprecated ice_name

Update Ice version in some files

This reverts commit ffb4677.

Update js Ice dependencies to 3.6.1

Update js Ice dependencies to 3.6.1

Fixed Ice-E demo build to work when Ice-E is not installed in /usr