fix recognition of -no-verbose

while probably not too useful, the old configure does allow explicitly
disabling verbose mode.

Change-Id: If0585443c649a67f616b3668cc90b18fecde11ba
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

mkspecs/features/qt_configure.prf

@@ -183,6 +183,11 @@ defineTest(qtConfParseCommandLine) {
             export(QMAKE_CONFIG_VERBOSE)
             next()
         }
+        contains(c, "^-no-v")|contains(c, "^--?no-verbose") {
+            QMAKE_CONFIG_VERBOSE = false
+            export(QMAKE_CONFIG_VERBOSE)
+            next()
+        }
 
         # parse out opt and val
         contains(c, "^--?enable-(.*)") {