Add linter script which will replace the ad-hoc commands ran by the linter Buildbot.

Tools/lint.sh

@@ -0,0 +1,37 @@
+#! /bin/sh
+#
+# Linter script that checks for common style issues in Dolphin's codebase.
+
+REPO_BASE=$(realpath $(dirname $0)/..)
+
+fail=0
+
+# Step 1: check for includes ordering.
+echo "[.] Checking #include statements ordering."
+res=$(
+  ${REPO_BASE}/Tools/check-includes.py \
+      $(find ${REPO_BASE}/Source/Core -name "*.cpp" -o -name "*.h") \
+      2>&1 \
+      >/dev/null
+)
+if [ -n "${res}" ]; then
+  echo "FAIL: ${res}"
+  fail=1
+else
+  echo "OK"
+fi
+
+# Step 2: check for trailing whitespaces.
+echo "[.] Checking for trailing whitespaces."
+res=$(
+    find ${REPO_BASE}/Source/Core -name "*.cpp" -o -name "*.h" \
+        | xargs egrep -n "\s+$"
+)
+if [ -n "$res" ]; then
+  echo "FAIL: ${res}"
+  fail=1
+else
+  echo "OK"
+fi
+
+exit ${fail}