go/internal/gccgoimporter: add missing testfile (fix 1.9 build)

Change-Id: Icba8d6917dcac4b8f541fc11305981539a12924a
Reviewed-on: https://go-review.googlesource.com/36116
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/go/internal/gccgoimporter/testdata/alias.gox b/go/internal/gccgoimporter/testdata/alias.gox
new file mode 100644
index 0000000..ced7d84
--- /dev/null
+++ b/go/internal/gccgoimporter/testdata/alias.gox
@@ -0,0 +1,4 @@
+v1;
+package alias;
+pkgpath alias;
+type <type 115 "I1" <type 116 interface { M1 (? <type 117 "IntAlias2" = <type 118 "IntAlias" = <type 119 "Int" <type -11>>>>) < type 114>; M2 () <type 1>; }>>;