CB-9825 framework tag spec parsing

 This closes #461
diff --git a/cordova-common/src/PluginInfo/PluginInfo.js b/cordova-common/src/PluginInfo/PluginInfo.js
index bf1f75b..0be0c41 100644
--- a/cordova-common/src/PluginInfo/PluginInfo.js
+++ b/cordova-common/src/PluginInfo/PluginInfo.js
@@ -318,6 +318,7 @@
                 parent: el.attrib.parent,
                 custom: isStrTrue(el.attrib.custom),
                 src: el.attrib.src,
+                spec: el.attrib.spec,
                 weak: isStrTrue(el.attrib.weak),
                 versions: el.attrib.versions,
                 targetDir: el.attrib['target-dir'],