qgis: Move homepage under license

See: https://trac.macports.org/ticket/55905

gis/qgis/Portfile

@@ -10,7 +10,6 @@ PortGroup           qt4     1.0
 name                qgis
 version             2.18.14
 #revision            2
-homepage            http://www.qgis.org/
 categories          gis
 maintainers         {vince @Veence}
 description         QGIS is a user-friendly GIS based on Qt 4
@@ -22,6 +21,8 @@ long_description    QGIS is an alternative to commercial GIS such as ESRI produc
 platforms           darwin
 license             GPL-2+
 
+homepage            http://www.qgis.org/
+
 set version_u       [string map {. _} ${version}]
 #github.setup        qgis QGIS ${version_u} final-
 distname            final-${version_u}