Add fuzzer targeting load_file

tests/jq_fuzz_load_file.c

@@ -0,0 +1,27 @@
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "jv.h"
+
+int LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
+  // Create file with fuzzer data
+  char filename[256];
+  sprintf(filename, "/tmp/libfuzzer.%d", getpid());
+  FILE *fp = fopen(filename, "wb");
+  if (!fp) {
+    return 0;
+  }
+  fwrite(data, size, 1, fp);
+  fclose(fp);
+
+  // Fuzz the two version of jv_load_file
+  jv data1 = jv_load_file(filename, 1);
+  jv_free(data1);
+  jv data2 = jv_load_file(filename, 0);
+  jv_free(data2);
+
+  // Clean up fuzz file
+  unlink(filename);
+
+  return 0;
+}