host: register unittests

Host unittests were not registered so they wouldn't run.

src/host.h

@@ -146,5 +146,7 @@ void HostMoveToSpare(Host *);
 uint32_t HostSpareQueueGetSize(void);
 void HostPrintStats (void);
 
+void HostRegisterUnittests(void);
+
 #endif /* __HOST_H__ */
 

src/runmode-unittests.c

@@ -213,6 +213,7 @@ void RunUnittests(int list_unittests, char *regex_arg)
     ConfYamlRegisterTests();
     TmqhFlowRegisterTests();
     FlowRegisterTests();
+    HostRegisterUnittests();
     SCSigRegisterSignatureOrderingTests();
     SCRadixRegisterTests();
     DefragRegisterTests();