Fix for host simpleperf 'gettid' unsat.

Bug: 26900419
Change-Id: Ifefd017f4b62ecfb2521bd1c38dbb3b09054f205
diff --git a/libbacktrace/Android.mk b/libbacktrace/Android.mk
index 6cffb11..ee56a5e 100644
--- a/libbacktrace/Android.mk
+++ b/libbacktrace/Android.mk
@@ -60,6 +60,9 @@
 	liblog \
 	libunwind \
 
+libbacktrace_static_libraries := \
+	libcutils
+
 module := libbacktrace
 module_tag := optional
 build_type := target