8184135: Remove obsolete dga code and binaries from Solaris SPARC build.
Reviewed-by: serb, psadhukhan, pnarayanan

8154269: Remove unused or unnecessary Xm/Xt files and header includes
Reviewed-by: serb, ssadetsky

8056216: Remove "sun" directory layer from libawt and common
Reviewed-by: erikj, ihse, coffeys