Add libgabi++. We need this for RTTI.

Change-Id: I0cae803b16babf84e7be2e80681d33469ce43964
diff --git a/target/product/core.mk b/target/product/core.mk
index 01685bd..29cf710 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -48,6 +48,7 @@
     libdex \
     libdvm \
     libexpat \
+    libgabi++ \
     libicui18n \
     libicuuc \
     libjavacore \