[releng] Add auto-generated files to gitignore

these new files are created by Tycho 1.5

Change-Id: Ibf89b40b81235f8be40b3d3bf886c9fac0a184df
diff --git a/.gitignore b/.gitignore
index df6c7c8..a2267a1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,6 @@
 .nfs*
 .polyglot.build.properties
 check_code_cleanliness_workspace/
+.META-INF_MANIFEST.MF
+.polyglot..META-INF_MANIFEST.MF
+*.takari_issue_192