Ignore directories from the Bazel IntelliJ plugin

These directories contain the generated project files from the Bazel IntelliJ plugin. See these links for info:

8c92239f41/.gitignore
8c92239f41/base/src/com/google/idea/blaze/base/sync/data/BlazeDataStorage.java (L36)

community/Bazel.gitignore

@@ -4,3 +4,10 @@
 # Ignore all bazel-* symlinks. There is no full list since this can change
 # based on the name of the directory bazel is cloned into.
 /bazel-*
+
+# Directories for the Bazel IntelliJ plugin containing the generated
+# IntelliJ project files and plugin configuration. Seperate directories are
+# for the IntelliJ, Android Studio and CLion versions of the plugin.
+/.ijwb/
+/.aswb/
+/.clwb/