Add compat symlink preferred-arch /system/bin/dalvikvm.

Test: Flash and boot
Test: adb shell ls -l /system/bin/dalvikvm
Bug: 124106384
Bug: 124924906
Change-Id: I1766af561e6b268a1c914808e872fce97a09631e
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 944554a..8754fb5 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -44,6 +44,7 @@
 
 # TODO(b/124106384): Clean up compat symlinks for ART binaries.
 ART_BINARIES= \
+  dalvikvm \
   dalvikvm32 \
   dalvikvm64 \
   dex2oat \