Add tf_fuzz tool

This is fully derived from tf-m repo.

Signed-off-by: Karl Zhang <karl.zhang@arm.com>
Change-Id: I8d35e70eda9081af66d8fa3f3cb4beb1d953060e
diff --git a/tf_fuzz/visualStudio/unistd.c b/tf_fuzz/visualStudio/unistd.c
new file mode 100644
index 0000000..7e21cc5
--- /dev/null
+++ b/tf_fuzz/visualStudio/unistd.c
@@ -0,0 +1,3 @@
+int isatty(int arg) {
+	return 0;
+}
\ No newline at end of file