configure: do not prefer qmake6 over qmake

See also previous commit - if Qt6 is installed in macOS, _qmake6_ is
linked to _/usr/local/bin_.

Author: MartinPulec

configure.ac

@@ -2912,7 +2912,7 @@ AC_PATH_PROGS_FEATURE_CHECK([QTCHOOSER], [qtchooser],
 
 #AC_MSG_NOTICE("Qmake: $QMAKE")
 if test "x$QMAKE" = "x"; then
-        AC_PATH_PROGS(QMAKE, [qmake6 qmake-qt5 qmake], [:], [/usr/lib/qt5/bin:$PATH])
+        AC_PATH_PROGS(QMAKE, [qmake qmake6 qmake-qt5], [:], [/usr/lib/qt5/bin:$PATH])
 fi
 
 if test "$QMAKE" -a "$QMAKE" != ":"