add a few more generated files to .gitignore

libs/.gitignore

@@ -19,6 +19,11 @@ opal
 *_manifest.rc
 *.pc
 
+*/.dirstamp
+*/*/.dirstamp
+*/*/*/.dirstamp
+*/*/*/*/.dirstamp
+
 /*.tar.*
 
 /*/*.dSYM/
@@ -978,6 +983,8 @@ opal
 /yaml/tests/run-parser
 /yaml/tests/run-scanner
 
+/broadvoice/broadvoice.spec
+
 /zeromq-*/
 /jpeg-8d/
 /v8-*/