Adds .polyglot.META-INF to .gitignore

Change-Id: Iec0bf0a2fcdb15e60512d7267f4807d5f50a394d
Signed-off-by: Lars Vogel <[email protected]>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.ui/+/192314
Tested-by: Mickael Istria <[email protected]>
Reviewed-by: Mickael Istria <[email protected]>

Author: vogella

Diff for: .gitignore

@@ -10,3 +10,5 @@ Snap.*
 /.settings/
 /.project
 .DS_Store
+.polyglot.META-INF
+