Update instrumentation fuzzer with new flag

Signed-off-by: Phil Estes <estesp@gmail.com>

Author: estesp

contrib/fuzz/oss_fuzz_build.sh

@@ -39,7 +39,7 @@ compile_fuzzers() {
 
 # This is from https://github.com/AdamKorcz/instrumentation
 cd $SRC/instrumentation
-go run main.go $SRC/containerd/images
+go run main.go --target_dir $SRC/containerd/images
 
 apt-get update && apt-get install -y wget
 cd $SRC