move definition of configure -continue switch to builtins

... where it actually belongs, as it should work in each repo in a
modular build.

Change-Id: I5463f0bcacb239900bed0b0f7be9cf32a3eab04e
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

configure.json

@@ -64,7 +64,6 @@
             "commercial": "void",
             "compile-examples": { "type": "boolean", "name": "compile_examples" },
             "confirm-license": "void",
-            "continue": "void",
             "dbus": { "type": "optionalString", "values": [ "no", "yes", "linked", "runtime" ] },
             "dbus-linked": { "type": "void", "name": "dbus", "value": "linked" },
             "dbus-runtime": { "type": "void", "name": "dbus", "value": "runtime" },

mkspecs/features/data/configure.json

@@ -7,6 +7,8 @@
             "v": { "type": "enum", "name": "verbose", "values": { "yes": "true", "no": "false" } },
             "verbose": { "type": "enum", "values": { "yes": "true", "no": "false" } },
 
+            "continue": "void",
+
             "recheck": { "type": "void", "name": "cache_use", "value": "positive" },
             "recheck-all": { "type": "void", "name": "cache_use", "value": "none" },