.bazelrc: Change relative path to common.bazelrc

.bazelrc needs to point to %workspace%/common.bazelrc otherwise it
treats it as a relative path from CWD.

TEST=`bazel-5 build :all` from cros/test

Change-Id: Idb02e3e72d2284a62bd8f5066f1e48cb746f0743
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/rules_cros/+/3445306
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Chris McDonald <cjmcdonald@chromium.org>
diff --git a/.bazelrc b/.bazelrc
index 2ac68ab..34ee68c 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -1,7 +1,7 @@
 # bazelrc settings for developing & testing rules_cros itself.
 # Import the default cros bazelrc settings.
-import common.bazelrc
+import %workspace%/common.bazelrc
 # The host platform definition needs to be overridden to refer to a local target
 # to work around what appears to be a bug in Bazel.