Add HB_LineBreakType to qharfbuzz_copy_p.h.

The QTextLayout relies on this enum to be defined.

Change-Id: Ibcc8a0073bd56e29431c52c4ea54a909ff42f07b
Reviewed-on: http://codereview.qt.nokia.com/537
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Simon Hausmann <simon.hausmann@nokia.com>

src/gui/text/qharfbuzz_copy_p.h

@@ -66,6 +66,13 @@ typedef enum {
   HB_Err_Out_Of_Memory                = 0xDEAD
 } HB_Error;
 
+typedef enum {
+    HB_NoBreak,
+    HB_SoftHyphen,
+    HB_Break,
+    HB_ForcedBreak
+} HB_LineBreakType;
+
 typedef QT_PREPEND_NAMESPACE(quint32) HB_Glyph;
 typedef void * HB_Font;
 typedef void * HB_Face;