Detect CDB within Windows SDK 8.

Change-Id: I4046c44deb47cf27d1da597dd25e14a62bdbb59e
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/libs/qtcreatorcdbext/cdb_detect.pri

@@ -11,5 +11,11 @@ win32-msvc* {
     !exists($$CDB_PATH):CDB_PATH="$$(ProgramW6432)/Debugging Tools For Windows (x86)/sdk"
     !exists($$CDB_PATH):CDB_PATH="$$(ProgramW6432)/Debugging Tools For Windows (x64)/sdk"
     !exists($$CDB_PATH):CDB_PATH="$$(ProgramW6432)/Debugging Tools For Windows 64-bit/sdk"
-    !exists($$CDB_PATH)::CDB_PATH=""
+#   Starting from Windows SDK 8, the headers and libs are under 'ProgramFiles (x86)'.
+#   The libraries are under 'ProgramFiles'as well, so, check for existence of 'inc'.
+#   32bit qmake:
+    !exists($$CDB_PATH):CDB_PATH="$$(ProgramFiles)/Windows Kits/8.0/Debuggers"
+#   64bit qmake:
+    !exists($$CDB_PATH/inc):CDB_PATH="$$(ProgramFiles) (x86)/Windows Kits/8.0/Debuggers"
+    !exists($$CDB_PATH/inc):CDB_PATH=""
 }