libunwind is added to the static depedencies

libunwindbacktrace no longer includes libunwind. So, libunwind is
explicitly added to the dependency list.

Bug: 64730695
Test: build 2017 pixel device
Test: m dex2oats
Change-Id: Id2e987bbe17483aa9bea47b4da2f5ae4e6244713
1 file changed