qt53: new port

adds qt5.3 support, primarily of use only to 10.6.8 at present

see: https://trac.macports.org/ticket/58322

_resources/port1.0/group/qmake5-1.0.tcl

@@ -165,6 +165,13 @@ pre-configure {
         puts ${cache} QMAKE_LFLAGS+="${qmake5_l_flags}"
     }
 
+    if {${os.platform} eq "darwin" && ${os.major} < 11} {
+        # use newer cctools on older platforms to handle output from newer clang versions
+        depends_build-append port:cctools
+        puts ${cache} QMAKE_AR="${prefix}/bin/ar\ cq"
+        puts ${cache} QMAKE_RANLIB="${prefix}/bin/ranlib"
+    }
+
     # accommodating variant request varies depending on how qtbase was built
     set base_debug false
     foreach {qt_test_name qt_test_info} [array get available_qt_versions] {

_resources/port1.0/group/qt5-1.0.tcl

@@ -14,6 +14,7 @@ array set available_qt_versions {
     qt57  {qt57-qtbase  5.7}
     qt56  {qt56-qtbase  5.6}
     qt55  {qt55-qtbase  5.5}
+    qt53  {qt53-qtbase  5.3}
 }
 #qt5-kde {qt5-kde 5.8}
 
@@ -50,7 +51,7 @@ proc qt5.get_default_name {} {
         #     Qt 5.3: Deployment only
         # Qt 5.0-5.2: Occasionally tested
         #
-        return qt55
+        return qt53
         #
     } elseif { ${os.major} == 11 } {
         #