Language installation using ASE langinstall fails in pre-15.0 ASE location

[CR #398720]

Addition of any new Sybase supported language using langinstall on UNIX (or langinst.exe on Windows) fails if you install SDK 15.0 in a pre-15.0 ASE installation directory. SDK 15.0 locales overwrites the locales in the pre-15.0 ASE installation directory.

Sybase recommends that you not install SDK 15.0 in a pre-15.0 ASE release area.