Add go.mod file for go1.11
am: ee74203bfb

Change-Id: Iced38c29d075449927d72d104c46c75d7b20613e
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..cc328e0
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,9 @@
+module android/soong
+
+require github.com/golang/protobuf v0.0.0
+
+require github.com/google/blueprint v0.0.0
+
+replace github.com/golang/protobuf v0.0.0 => ../../external/golang-protobuf
+
+replace github.com/google/blueprint v0.0.0 => ../blueprint