Make gitignore ignore some more of the output from windows builds

Change-Id: I3fbb078c16cd388ed25dd4daeffa36576d13a360
Reviewed-on: http://gerrit.dmdirc.com/73
Reviewed-by: Chris Smith <chris@dmdirc.com>
Tested-by: Chris Smith <chris@dmdirc.com>

.gitignore

@@ -20,3 +20,7 @@ __history
 *.bdsproj
 *.bdsproj.local
 *.identcache
+*.res
+*.a
+*.o
+*.ppu