Reduce the CMake verbosity for builds, to avoid exceeding Travis CI's 10K line limit for the log.
diff --git a/extras/scripts/postsubmit-helper.sh b/extras/scripts/postsubmit-helper.sh
index 147c47b..4d67e1f 100755
--- a/extras/scripts/postsubmit-helper.sh
+++ b/extras/scripts/postsubmit-helper.sh
@@ -66,7 +66,7 @@
 esac
 
 run_make() {
-  make -j$N_JOBS VERBOSE=1
+  make -j$N_JOBS --no-print-directory VERBOSE=1 CMAKE_NO_VERBOSE=1 CMAKE_RULE_MESSAGES=OFF
 }
 
 rm -rf build