project: add some paths to gitignore for vs generated files

Change-Id: Ifbad14945af6a2d0964a27f5590cc4d16f033f1f
Reviewed-by: Philippe Gorley <philippe.gorley@savoirfairelinux.com>

.gitignore

 *.user
+
+GeneratedFiles/
+.vs/
+x64/
+x86/
+[wW]in32/
+.qmake.stash
+debug/
+release/
\ No newline at end of file