Link libc++demangle.

The demangler is moving out of libc++abi to save on bloat.

Test: make checkbuild
Bug: http://b/138245375
Change-Id: I7402894bb326f524388c9efdf86509dad50f2018
diff --git a/linker/Android.bp b/linker/Android.bp
index 5e7a921..1880c27 100644
--- a/linker/Android.bp
+++ b/linker/Android.bp
@@ -300,7 +300,10 @@
 
     target: {
         android: {
-            static_libs: ["libdebuggerd_handler_fallback"],
+            static_libs: [
+                "libc++demangle",
+                "libdebuggerd_handler_fallback",
+            ],
         },
     },
     compile_multilib: "both",