9671de4892
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.