Enable building ATRACE stubs on Windows

The header contained inline functions that called unimplemented code on
Windows.  Enable building the implementations.

Bug: none
Test: make -j 50 checkbuild
Change-Id: I11b39e6f5c72fc000088182f3631a9f538474c42
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index 37afb98..4291212 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -89,6 +89,7 @@
                 "socket_inaddr_any_server_windows.cpp",
                 "socket_network_client_windows.cpp",
                 "sockets_windows.cpp",
+                "trace-host.cpp",
             ],
 
             enabled: true,