Fixed symcc custom mutator

custom_mutators/symcc/test_examples/file_test.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int main(int argc, char** argv){
+  if (argc<2){
+    printf("Need a file argument\n");
+    return 1;
+  }
+  int fd=open(argv[1],O_RDONLY);
+  if (fd<0){
+    printf("Couldn't open file\n");
+    return 1;
+  }
+  uint32_t value = 0;
+  
+  read(fd,&value,sizeof(value));
+  close(fd);
+
+  value=value^0xffffffff;
+  if (value== 0x11223344) printf("Value one\n");
+  if (value == 0x44332211) printf("Value two\n");
+  if (value != 0x0) printf("Not zero\n");
+  return 0; 
+}