Android tests: push data deps on the device

This for unittests that require extra deps file like the
ftrace unittests.

Change-Id: I6dbfb5804d2eb425e92c220ed34deedc3308fb9e
diff --git a/build/test_data.txt b/build/test_data.txt
new file mode 100644
index 0000000..2ceb2b5
--- /dev/null
+++ b/build/test_data.txt
@@ -0,0 +1,3 @@
+# List of test deps that should be pushed on the device. Paths are relative
+# to the root.
+ftrace_reader/test/data/