Add missing data for test.

Test: atest libidsig.test
Change-Id: I57c0f1e8d94a8d5834f7df31393d64c2a212be74
diff --git a/idsig/Android.bp b/idsig/Android.bp
index 06203cd..c5fc161 100644
--- a/idsig/Android.bp
+++ b/idsig/Android.bp
@@ -33,4 +33,7 @@
     defaults: ["libidsig.defaults"],
     test_suites: ["general-tests"],
     compile_multilib: "first",
+    data: [
+        "testdata/input.*",
+    ],
 }