Update script for updating libfuzzer vendoring

The old compiler-rt repo is deprecated.

Author: fitzgen

README.md

@@ -63,7 +63,7 @@ $ ./target/debug/fuzzed
 ## Updating libfuzzer from upstream
 
 ```
-./update-libfuzzer.sh <llvm/compiler-rt SHA1>
+./update-libfuzzer.sh <github.com/llvm-mirror/llvm-project SHA1>
 ```
 
 ## License

update-libfuzzer.sh

@@ -1,10 +1,21 @@
 #!/bin/bash -ex
 
+# Usage:
+#
+#     ./update-libfuzzer $commit_hash
+#
+# Where `$commit_hash` is a commit hash from
+# https://github.com/llvm-mirror/llvm-project
+
+set -ex
+
+cd "$(dirname $0)"
 project_dir="$(pwd)"
+
 tmp_dir="$(mktemp -d)"
 
-git clone https://github.com/llvm-mirror/compiler-rt.git "$tmp_dir"
+git clone https://github.com/llvm/llvm-project.git "$tmp_dir"
 cd "$tmp_dir"
 git checkout "$1"
 rm -rf "$project_dir/libfuzzer/"
-mv "$tmp_dir/lib/fuzzer/" "$project_dir/libfuzzer/"
+mv "$tmp_dir/compiler-rt/lib/fuzzer/" "$project_dir/libfuzzer/"