add template for directives

fuzz/corpus/hashicorp%terraforminternal%terraform%testdata%provider-meta-set%main.tf

@@ -0,0 +1,13 @@
+resource "test_instance" "bar" {
+  foo = "bar"
+}
+
+terraform {
+  provider_meta "test" {
+    baz = "quux"
+  }
+}
+
+module "my_module" {
+  source = "./my-module"
+}