Finished Printpoints for now.

They always go to printf(). So the go to the console.
In the future, I can add an option to go to the "GDB output" tab.

Also, it may be possible to have a "Printpoint output" tab.
If the format has some magic text, the handleText() mechanism
may be able to intercept the output. For example, if the format
is:

    "^PrintPointFormat %d %d\n"

Of course this would work only if dprintf uses printf().

src/SeerPrintpointCreateDialog.cpp

@@ -215,7 +215,7 @@ QString SeerPrintpointCreateDialog::printpointText () const {
         printpointParameters += " --line " + lineNumberText();
     }
 
-    printpointParameters += " " + format();
+    printpointParameters += " \"" + format() + "\"";
     printpointParameters += " " + arguments();
 
     return printpointParameters;