Create BUILD files and corresponding targets for tensorflow/core/lib/ssim/testdata/BUILD.

PiperOrigin-RevId: 342971963
Change-Id: Ia2ae38d2408428d05fdb3d104e7aceddd3e789d9

tensorflow/core/lib/ssim/BUILD

@@ -1,5 +1,3 @@
-load("//tensorflow:tensorflow.bzl", "filegroup")
-
 package(
     default_visibility = [
         "//tensorflow/core:__pkg__",
@@ -7,11 +5,7 @@ package(
     licenses = ["notice"],  # Apache 2.0
 )
 
-filegroup(
+alias(
     name = "testdata",
-    srcs = [
-        "testdata/checkerboard1.png",
-        "testdata/checkerboard2.png",
-        "testdata/checkerboard3.png",
-    ],
+    actual = "//tensorflow/core/lib/ssim/testdata:testdata",
 )

tensorflow/core/lib/ssim/testdata/BUILD

@@ -0,0 +1,18 @@
+# The ssim testdata package.
+load("//tensorflow:tensorflow.bzl", "filegroup")
+
+package(
+    default_visibility = [
+        "//tensorflow/core/lib/ssim:__pkg__",
+    ],
+    licenses = ["notice"],  # Apache 2.0
+)
+
+filegroup(
+    name = "testdata",
+    srcs = [
+        "checkerboard1.png",
+        "checkerboard2.png",
+        "checkerboard3.png",
+    ],
+)