Disable building of xfstests

Upgrading sys-fs/xfsprogs resulted in build failure of xfstests. Since
we don't run xfstests through auto-tests, remove use flag to prevent
building of xfstests.

BUG=b/186803593
TEST=Presubmit
RELEASE_NOTE=none

Change-Id: I6ae403264a555a2afe03ae51428a91721b0cca0a
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/19670
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
diff --git a/project-lakitu/profiles/base/package.use b/project-lakitu/profiles/base/package.use
index c6c2c6d..0377d76 100644
--- a/project-lakitu/profiles/base/package.use
+++ b/project-lakitu/profiles/base/package.use
@@ -98,3 +98,6 @@
 # customers that depend on net-tools hostname, let's keep the net-tools hostname.
 sys-apps/coreutils -hostname
 sys-apps/net-tools hostname
+
+# Remove building of xfstests since we run these tests outside of autotest-tests
+chromeos-base/autotest-tests -tests_xfsFilesystemTestSuite