Move tradefed_binary.go into subdir

Having two packages in the same directory makes it harder for go tools
to understande the directory structure.

For example, in build/soong, "go test ./cc/..." fails with cyclic
package imports.

Bug: n/a
Test: go test ./cc/... (in build/soong)
Change-Id: I7a040bf30b1e001680dd43fed9747e9651372274
diff --git a/tradefed/Android.bp b/tradefed/Android.bp
index f4e8334..4e4e6a7 100644
--- a/tradefed/Android.bp
+++ b/tradefed/Android.bp
@@ -15,7 +15,7 @@
 
 bootstrap_go_package {
     name: "soong-suite-harness",
-    pkgPath: "android/soong/suite_harness",
+    pkgPath: "android/soong/tradefed/suite_harness",
     deps: [
         "blueprint",
         "blueprint-pathtools",
@@ -25,7 +25,7 @@
         "soong-java",
     ],
     srcs: [
-        "tradefed_binary.go",
+        "suite_harness/tradefed_binary.go",
     ],
     pluginFor: ["soong_build"],
 }