Fix issues type with ldparser.

Sometime, in the most general case, the message is a warning, and not an error.
Two cases:
 * linker returning a message like this: 'filename: warning: description'
 * uic returns messages like this: 'Warning: description'

Change-Id: I2babe1de2753ea8b2871419f1b1405eb7ae73d48
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/projectexplorer/ldparser.cpp

@@ -106,6 +106,10 @@ void LdParser::stdError(const QString &line)
             description.startsWith(QLatin1String("instantiated from ")) ||
             description.startsWith(QLatin1String("In ")))
             task.type = Task::Unknown;
+        if (description.startsWith(QLatin1String("warning: "), Qt::CaseInsensitive)) {
+            task.type = Task::Warning;
+            task.description = description.mid(9);
+        }
 
         emit addTask(task);
         return;