Ignore all the DLLs

We don't keep any meterpreter DLLs in the main repo now, so this changes
the ignore to make sure nothing goes in.

.gitignore

@@ -67,17 +67,7 @@ external/source/exploits/**/Release
 
 # Avoid checking in Meterpreter binaries. These are supplied upstream by
 # the meterpreter_bins gem.
-data/meterpreter/elevator.*.dll
-data/meterpreter/ext_server_espia.*.dll
-data/meterpreter/ext_server_extapi.*.dll
-data/meterpreter/ext_server_incognito.*.dll
-data/meterpreter/ext_server_kiwi.*.dll
-data/meterpreter/ext_server_lanattacks.*.dll
-data/meterpreter/ext_server_mimikatz.*.dll
-data/meterpreter/ext_server_priv.*.dll
-data/meterpreter/ext_server_stdapi.*.dll
-data/meterpreter/metsrv.*.dll
-data/meterpreter/screenshot.*.dll
+data/meterpreter/*.dll
 
 # Avoid checking in Meterpreter libs that are built from
 # private source. If you're interested in this functionality,