Revision 270

[tcl8.5]
  * Removed build-essential package from tcl8.5-dev dependencies.
  * Moved tcl.m4 to /usr/share/aclocal/tcl8.5.m4 to make it easier to use
    different versions of tcl.m4.
  * Removed alternative of tcl.m4 (the link to default tcl.m4 is to be
    maintained by tcl-dev package).