Debugger[CDB]: Use file normalization function from utils.

Remove complicated/expensive function in dbgwinutils
in favour of the utils one (improved to upper case
the drive letter) as it is sufficient now with
the improved checking in editor manager/location mark.

src/libs/utils/winutils.cpp

@@ -173,6 +173,9 @@ QTCREATOR_UTILS_EXPORT QString normalizePathName(const QString &name)
     canonicalName = getLongPathName(canonicalName);
     if (canonicalName.isEmpty())
         return name;
+    // Upper case drive letter
+    if (canonicalName.size() > 2 && canonicalName.at(1) == QLatin1Char(':'))
+        canonicalName[0] = canonicalName.at(0).toUpper();
     return canonicalName;
 }