[build] Add clang-tidy to Travis

scripts/linux/tidy.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -e
+set -o pipefail
+
+# Ensure mason is on the PATH
+export PATH="`pwd`/.mason:${PATH}" MASON_DIR="`pwd`/.mason"
+
+BUILDTYPE=${BUILDTYPE:-Release}
+
+export CLANG_TIDY=clang-tidy-3.8
+
+mapbox_time "config" \
+make config
+
+mapbox_time "tidy" \
+make tidy