bind/benchmark: move package to testdata

Move the benchmark support package to the testdata directory, just
like the other test packages.

Change-Id: Idc35ca973a7da78e8c8bb640ba60cfb947fbed5b
Reviewed-on: https://go-review.googlesource.com/101896
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/bind/java/seq_test.go b/bind/java/seq_test.go
index 3e82a56..07d02f3 100644
--- a/bind/java/seq_test.go
+++ b/bind/java/seq_test.go
@@ -55,7 +55,7 @@
 	if testing.Short() {
 		t.Skip("skipping benchmark in short mode.")
 	}
-	runTest(t, []string{"golang.org/x/mobile/bind/benchmark"}, "", "SeqBench")
+	runTest(t, []string{"golang.org/x/mobile/bind/testdata/benchmark"}, "", "SeqBench")
 }
 
 // runTest runs the Android java test class specified with javaCls. If javaPkg is
diff --git a/bind/objc/seq_test.go b/bind/objc/seq_test.go
index c3f86f4..941d6e4 100644
--- a/bind/objc/seq_test.go
+++ b/bind/objc/seq_test.go
@@ -51,7 +51,7 @@
 	if testing.Short() {
 		t.Skip("skipping benchmark in short mode.")
 	}
-	runTest(t, []string{"golang.org/x/mobile/bind/benchmark"}, "xcodebench", "SeqBench.m", true)
+	runTest(t, []string{"golang.org/x/mobile/bind/testdata/benchmark"}, "xcodebench", "SeqBench.m", true)
 }
 
 // TestObjcSeqWrappers runs ObjC test SeqWrappers.m.
diff --git a/bind/benchmark/benchmark.go b/bind/testdata/benchmark/benchmark.go
similarity index 100%
rename from bind/benchmark/benchmark.go
rename to bind/testdata/benchmark/benchmark.go