[GWP-ASan] Fix unittest build include.

GWP-ASan unittests failed to build on arm64 because of a missing
dependency on liblog. Looks like something in the transient dependency
from libasync_safe -> liblog is header only now, and so we don't get
defintions of some libraries.

Fix up the build by including this library.

Bug: 152354649
Test: atest gwp_asan_unittest
Change-Id: I6a95e1a6e867cfa015567c7171feac86013925f4
diff --git a/Android.bp b/Android.bp
index aeb1c77..25abe52 100644
--- a/Android.bp
+++ b/Android.bp
@@ -129,6 +129,7 @@
         "gwp_asan",
         "gwp_asan_crash_handler",
         "libasync_safe",
+        "liblog",
     ],
     srcs: [
         "android/test_printf.cpp",