qmljs: added qmljsconstants.h

Moved Document::Language, Import::Type and StaticAnalysis::Severity
enums to qmljsconstants.h and renamed values removing the redundant
part.
Thus the effective length changed little or improved
(Document::QmlLanguage => Language::Qml).

The separate file allows better reuse of enum values without introducing
circular dependencies.

Change-Id: I5186d7c04f5d3f6c289068b919be5ff1ff118326
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>

src/libs/qmljs/qmljsinterpreter.h

@@ -32,6 +32,7 @@
 
 #include <qmljs/qmljsdocument.h>
 #include <qmljs/qmljs_global.h>
+#include <qmljs/qmljsconstants.h>
 
 #include <QFileInfoList>
 #include <QList>
@@ -866,17 +867,6 @@ public:
 class QMLJS_EXPORT ImportInfo
 {
 public:
-    enum Type {
-        InvalidImport,
-        ImplicitDirectoryImport,
-        LibraryImport,
-        FileImport,
-        DirectoryImport,
-        QrcFileImport,
-        QrcDirectoryImport,
-        UnknownFileImport // refers a file/directory that wasn't found
-    };
-
     ImportInfo();
 
     static ImportInfo moduleImport(QString uri, LanguageUtils::ComponentVersion version,
@@ -888,7 +878,7 @@ public:
     static ImportInfo implicitDirectoryImport(const QString &directory);
 
     bool isValid() const;
-    Type type() const;
+    ImportType::Enum type() const;
 
     // LibraryImport: uri with ',' separator
     // Other: non-absolute path
@@ -905,7 +895,7 @@ public:
     AST::UiImport *ast() const;
 
 private:
-    Type _type;
+    ImportType::Enum _type;
     LanguageUtils::ComponentVersion _version;
     QString _name;
     QString _path;