重构项目，现支持多线程操作

vendor/lz4/ossfuzz/ossfuzz.sh

@@ -0,0 +1,23 @@
+#!/bin/bash -eu
+
+# This script is called by the oss-fuzz main project when compiling the fuzz
+# targets. This script is regression tested by travisoss.sh.
+
+# Save off the current folder as the build root.
+export BUILD_ROOT=$PWD
+
+echo "CC: $CC"
+echo "CXX: $CXX"
+echo "LIB_FUZZING_ENGINE: $LIB_FUZZING_ENGINE"
+echo "CFLAGS: $CFLAGS"
+echo "CXXFLAGS: $CXXFLAGS"
+echo "OUT: $OUT"
+
+export MAKEFLAGS+="-j$(nproc)"
+
+pushd ossfuzz
+make V=1 all
+popd
+
+# Copy the fuzzers to the target directory.
+cp -v ossfuzz/*_fuzzer $OUT/