tcl: Fix dangerous do_install staging references

tcl: Fix dangerous do_install staging references

Nothing should ever be poking files directly into the staging/sysroot
directories, it should always go through ${D}.

This patch ensures this recipe does this and hence fixes various
potential build issues such as lack of sstate tracking of files.

(From OE-Core rev: 7642143760c0157aba80cea7b427024ee097cc2c)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>