[test][syslog] Relocate unit tests to exist alongside source

Change-Id: I9df939c00866878c97a6ae2e0cfc4bc36b8811c0

zircon/system/utest/syslog/BUILD.gn → zircon/system/ulib/syslog/test/BUILD.gn

@@ -2,6 +2,13 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+group("test") {
+  testonly = true
+  deps = [
+    ":syslog",
+  ]
+}
+
 test("syslog") {
   sources = [
     "syslog_socket_tests.cpp",

zircon/system/utest/BUILD.gn

@@ -90,6 +90,7 @@ if (current_cpu != "") {
       "$zx/system/ulib/region-alloc/test",
       "$zx/system/ulib/simplehid/test",
       "$zx/system/ulib/storage-metrics/test",
+      "$zx/system/ulib/syslog/test",
       "$zx/system/ulib/tftp:tftp-test",
       "$zx/system/ulib/trace-reader:tests",
       "$zx/system/ulib/trace-vthread:tests",
@@ -174,7 +175,6 @@ if (current_cpu != "") {
       "stdio",
       "sysconf",
       "sysinfo",
-      "syslog",
       "sysmem",
       "task-utils",
       "thread-initial-state",