add original check for tcl

Signed-off-by: Cristian Stoica <crististm@gmail.com>
search tcl header and libs in non-standard places
prepare to use the modified tcl checker
autogenerated

Signed-off-by: Cristian Stoica <crististm@gmail.com>
check tcl headers
updates
use as_if constructs

Signed-off-by: Cristian Stoica <crististm@gmail.com>