CDB: Only use codemodel breakpoint correction for old cdbs.

Since version 6.2 cdb supports setting breakpoints on non
codelines and automatically set it to the next available line.

Change-Id: I27facf4f2463bad76a20ef0abb5a5412471c296f
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/libs/qtcreatorcdbext/stringutils.h

@@ -134,6 +134,7 @@ bool integerFromWString(const std::wstring &s, Integer *v)
 }
 
 void replace(std::wstring &s, wchar_t before, wchar_t after);
+void replace(std::string &s, char before, char after);
 
 // Stream  a string onto a char stream doing backslash & octal escaping
 // suitable for GDBMI usable as 'str << gdbmiStringFormat(wstring)'