.gitignore fine tuning for gradle. Limit existing patterns.

.gitignore

@@ -7,19 +7,18 @@
 /gh-pages
 /ideaSDK
 /android-studio/sdk
-out
-tmp
+/out
+/tmp
 workspace.xml
 *.versionsBackup
 /idea/testData/debugger/tinyApp/classes*
 /jps-plugin/testData/kannotator
-ultimate/.DS_Store
-ultimate/.idea/shelf
-ultimate/dependencies
-ultimate/ideaSDK
-ultimate/out
-ultimate/tmp
-ultimate/workspace.xml
-ultimate/*.versionsBackup
-.gradle
-build
+/ultimate/dependencies
+/ultimate/ideaSDK
+/ultimate/out
+/ultimate/tmp
+/js/js.translator/testData/**/out/
+.gradle/
+build/
+!**/src/**/build
+