goldfish: add libunwindstack

Fix emulator booting

Test: build sdk_gphone_x86-userdebug
emulator
it should boot to home

Change-Id: I6f97c8a8eea07efcb7cc22357900fb85775b59a4
diff --git a/vndk/Android.mk b/vndk/Android.mk
index 25765ee..6c5a956 100644
--- a/vndk/Android.mk
+++ b/vndk/Android.mk
@@ -26,6 +26,7 @@
     libcompiler_rt\
     libbacktrace\
     libunwind\
+    libunwindstack\
     liblzma
 endif