QmlJS: Add special severity for loading type information

The designer has to be able to handle this error/warning
explicitly. To be able to identify the warning I added
a special severity.

Change-Id: I99571497f7327a7857244ef48334c14a254c8ca0
Reviewed-by: Marco Benelli <marco.benelli@qt.io>

src/libs/qmljs/qmljsconstants.h

@@ -56,11 +56,12 @@ enum Enum {
 namespace Severity {
 enum Enum
 {
-    Hint,         // cosmetic or convention
-    MaybeWarning, // possibly a warning, insufficient information
-    Warning,      // could cause unintended behavior
-    MaybeError,   // possibly an error, insufficient information
-    Error         // definitely an error
+    Hint,                   // cosmetic or convention
+    MaybeWarning,           // possibly a warning, insufficient information
+    Warning,                // could cause unintended behavior
+    ReadingTypeInfoWarning, // currently dumping type information
+    MaybeError,             // possibly an error, insufficient information
+    Error                   // definitely an error
 };
 }
 

src/libs/qmljs/qmljslink.cpp

@@ -453,8 +453,9 @@ bool LinkPrivate::importLibrary(Document::Ptr doc,
                 }
             }
             if (errorLoc.isValid()) {
-                warning(doc, errorLoc,
-                        Link::tr("QML module contains C++ plugins, currently reading type information..."));
+                appendDiagnostic(doc, DiagnosticMessage(Severity::ReadingTypeInfoWarning,
+                                                        errorLoc,
+                                                        Link::tr("QML module contains C++ plugins, currently reading type information...")));
                 import->valid = false;
             }
         } else if (libraryInfo.pluginTypeInfoStatus() == LibraryInfo::DumpError