Add a test

test/comment.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -e
+cd $(dirname $0)
+echo -n "Testing $(basename -s .sh $0) ... "
+t=$(pwd)/tmp/$(basename -s .sh $0)
+mkdir -p $t
+
+cat <<EOF | clang -c -o $t/a.o -xc -
+int main() {}
+EOF
+
+clang -fuse-ld=`pwd`/../mold -o $t/exe $t/a.o
+readelf -p .comment $t/exe | grep -q 'mold linker'
+
+echo OK