Update Makefile.am to add icon_theme.cc
Update Makefile.am to add icon_theme.cc

suzhe/google-gadgets-for-linux,suzhe/google-gadgets-for-linux,pmateti/google-gadgets-for-linux,suzhe/google-gadgets-for-linux,tectronics/google-gadgets-for-linux,suzhe/google-gadgets-for-linux,tectronics/google-gadgets-for-linux,tectronics/google-gadgets-for-linux,pmateti/google-gadgets-for-linux,tectronics/google-gadgets-for-linux,pmateti/google-gadgets-for-linux,pmateti/google-gadgets-for-linux