Use unified libvixl(d) instead of per-supported-arch libvixl(d)-arm(64).

Using a unified libvixl(s) saves space by sharing code that was common
to libvixl(d)-arm and libvixl(d)-arm64 and also addresses multiple
definitions issues that would cause ODR violations.

Test: 32-bit-only device boot test
Test: 32/64-bit device boot test
Change-Id: I1d67c43897e08bc0f5743eb038fe574ce2fb54f3
diff --git a/runtime/Android.bp b/runtime/Android.bp
index 86ee952..7c4792e 100644
--- a/runtime/Android.bp
+++ b/runtime/Android.bp
@@ -661,8 +661,7 @@
     ],
     shared_libs: [
         "libartd-compiler",
-        "libvixld-arm",
-        "libvixld-arm64",
+        "libvixld",
     ],
 }