tast: Add chromeos-5_10

BUG=b:171715474
TEST=repo sync and build chromeos-5.10

Change-Id: I54ad271cfde830ceeb902bbfeb951708e83199e0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2536713
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Guenter Roeck <groeck@chromium.org>
Commit-Queue: Guenter Roeck <groeck@chromium.org>
diff --git a/chromeos-base/tast-use-flags/tast-use-flags-9999.ebuild b/chromeos-base/tast-use-flags/tast-use-flags-9999.ebuild
index 90fa389..b26ffd4 100644
--- a/chromeos-base/tast-use-flags/tast-use-flags-9999.ebuild
+++ b/chromeos-base/tast-use-flags/tast-use-flags-9999.ebuild
@@ -80,6 +80,7 @@
 	kernel-4_14
 	kernel-4_19
 	kernel-5_4
+	kernel-5_10
 	kukui
 	kvm_host
 	kvm_transition