Update OWE to 0.2.10 and package its lock feed (#843)

* Update OWE to 0.2.10 and package its lock feed

* Print OWE regression failures during package checks

* Make OWE package regression independent of timestamp precision

pkgbuilds/owe/lock-policy-timestamp.patch

@@ -0,0 +1,18 @@
+diff --git i/test/lock_policy.c w/test/lock_policy.c
+index 8561616..6c554b1 100644
+--- i/test/lock_policy.c
++++ w/test/lock_policy.c
+@@ -576,6 +576,13 @@ int main(void) {
+         CHECK(!prepared_intro_matches(copy));
+         a = open(prepared, O_WRONLY);
+         CHECK(a >= 0 && write(a, "clip-c", 6) == 6);
++        /* Fast writes can share a timestamp on the builder filesystem.
++         * Advance mtime explicitly to exercise prepared-file invalidation. */
++        struct timespec changed_times[2] = {
++            { .tv_nsec = UTIME_OMIT },
++            { .tv_sec = g_app.intro_prepared_mtime.tv_sec + 1 }
++        };
++        CHECK(futimens(a, changed_times) == 0);
+         close(a);
+         CHECK(!prepared_intro_matches(prepared));
+         clear_prepared_intro();