Fix MythZoneMinder on mac; the proper way..

Following 6e2f231, it turns out, qmake has a different behaviour between adding to the LIBS variable (elements stays escaped) and QMAKE_LFLAGS (elements are un-escpade properly).

Compiler flags generated from running mysql-config should have been added to QMAKE_LFLAGS anyway. So use it

Author: jyavenard

mythplugins/mythzoneminder/mythzmserver/mythzmserver.pro

@@ -10,17 +10,15 @@ target.path = $${PREFIX}/bin
 
 INSTALLS = target
 
+MYSQLIBS = $$quote($$system(mysql_config --libs))
 macx {
     CONFIG += qt
     QT += sql
     #Can't use mysql_config output, as it could have been compiled with
     # universal support, and we may want just 32 or 64 bits
-    MYSQLIBS = "$$system(mysql_config --libs)"
     MYSQLIBS ~= s/-arch +[a-z0-9_]+//g
-    LIBS += $$sprintf($$MYSQLIBS) 
-} else {
-    LIBS += $$system(mysql_config --libs)
-}                                                                              
+}
+QMAKE_LFLAGS += $$MYSQLIBS
 
 linux: DEFINES += linux