Test ld-android.so directly

This CL addresses review comments from
https://android-review.googlesource.com/c/platform/bionic/+/595067

Test: bionic-unit-tests --gtest_filter=dl*
Change-Id: I2c0fdf2a89fe6ff134308e202fb99a74080ee0ed
diff --git a/tests/Android.bp b/tests/Android.bp
index 1521b73..25377df 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -413,6 +413,7 @@
     target: {
         android: {
             shared_libs: [
+                "ld-android",
                 "libdl",
                 "libdl_preempt_test_1",
                 "libdl_preempt_test_2",