* lib/gdb.exp (gdbtk_initialize_display): New proc which will

    * lib/gdb.exp (gdbtk_initialize_display): New proc which will
        set up the display for testing.
        (gdbtk_start): Convert all paths to paths that tcl will like.
        Export target information to environment.
        (_gdbtk_xvfb_init): New proc to start Xvfb if available and
        necessary.
        (_gdbtk_xvfb_exit): New proc to kill Xvfb if necessary.
        (to_tcl_path): New proc to convert a given pathname into
        a path acceptible as an argument to a tcl command.
        (_gdbtk_export_target_info): New proc to export target info
        into the environment for gdbtk testing.
        (gdbtk_done): New proc to signal end-of-test.