Add support for fuzzing cppdap

Add build rules, scripts, basic corpus, and dictionary.
Currently requires recent clang toolchain.

fuzz/run.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -e # Fail on any error.
+
+FUZZ_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd )"
+cd ${FUZZ_DIR}
+
+# Ensure we're testing with latest build
+[ ! -d "build" ] && mkdir "build"
+cd "build"
+cmake ../.. -GNinja -DCPPDAP_BUILD_FUZZER=1 -DCMAKE_BUILD_TYPE=RelWithDebInfo
+ninja
+
+cd ${FUZZ_DIR}
+[ ! -d "corpus" ] && mkdir "corpus"
+[ ! -d "logs" ] && mkdir "logs"
+cd "logs"
+rm crash-* fuzz-* || true
+${FUZZ_DIR}/build/cppdap-fuzzer ${FUZZ_DIR}/corpus ${FUZZ_DIR}/seed -dict=${FUZZ_DIR}/dictionary.txt -jobs=128