[636] Don't run TLS-PSK tests when disabled at compile time.

Thanks to 'TBK'.

Bug: https://github.com/eclipse/mosquitto/issues/636

ChangeLog.txt

@@ -11,6 +11,9 @@ Broker:
 Client library:
 - Fix incorrect PSK key being used if it had leading zeroes.
 
+Build:
+- Don't run TLS-PSK tests if TLS-PSK disabled at compile time. Closes #636.
+
 
 1.4.14 - 20170710
 =================

test/broker/Makefile

@@ -89,9 +89,11 @@ ifeq ($(WITH_TLS),yes)
 	./08-ssl-connect-identity.py
 	./08-ssl-connect-no-identity.py
 	./08-ssl-bridge.py
+ifeq ($(WITH_TLS_PSK),yes)
 	./08-tls-psk-pub.py
 	./08-tls-psk-bridge.py
 endif
+endif
 
 09 :
 	./09-plugin-auth-unpwd-success.py