Static libunwindstack has a static dependency on libasync_safe.

Cf.
https://cs.android.com/android/platform/superproject/+/master:system/unwinding/libunwindstack/Android.bp;l=100;drc=7b46d3741e3915091fec30877f46a6e8327db6bb

Test: env TARGET_PRODUCT=armv8 TARGET_BUILD_VARIANT=eng \
  ./art/test/testrunner/run_build_test_target.py -j80 \
  art-linux-bionic-x64-zipapex
Test: env TARGET_PRODUCT=armv8 TARGET_BUILD_VARIANT=eng \
  ./art/test/testrunner/run_build_test_target.py -j80 \
  art-linux-bionic-x64
Bug: 185984634
Change-Id: If9a832c34fee64516bd15c8c86c5ab567714ca5a
diff --git a/tools/signal_dumper/Android.bp b/tools/signal_dumper/Android.bp
index e2f30e3..33450d1 100644
--- a/tools/signal_dumper/Android.bp
+++ b/tools/signal_dumper/Android.bp
@@ -39,6 +39,13 @@
         "liblog",
         "liblzma",
     ],
+    target: {
+        bionic: {
+            whole_static_libs: [
+                "libasync_safe",
+            ],
+        },
+    },
 }
 
 cc_defaults {