bazel: Ignore environment directories

Change-Id: Ice6ec950f162017c5620fe26fc342ed298fde9ec
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/33740
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Keir Mierle <keir@google.com>
Reviewed-by: Armando Montanez <amontanez@google.com>
diff --git a/.bazelignore b/.bazelignore
index 9615219..db791e1 100644
--- a/.bazelignore
+++ b/.bazelignore
@@ -1,2 +1,4 @@
 .cipd
 .presubmit
+.environment
+environment