tcl8: re-add tcl 8 to support building expect

I'd be happy to remove expect from core as it has been unmaintained for years,
but sadly gcc/binutils test suites are basically written in it (via dejagnu),
and ltp makes use of it as well.

I attempted porting expect to tcl 9, but it's a tcl extension and makes
extensive use of features that have been deprecated in tcl 8 and removed
in tcl 9, and even pokes into tcl internals.

At some point hopefully the GNU toolchain upstreams are going to notice;
for now we'll carry tcl (latest) and tcl8 recipes.

tcl and tcl8 packages can be co-installed, the latter is adjusted
to contain tclsh8.

tcl-dev and tcl8-dev packages can also be co-installed, a few files
in tcl8-dev are renamed to avoid clashes with tcl-dev (tcl.pc -> tcl8.pc,
and similar for tclConfig.sh and tclooConfig.sh).

(From OE-Core rev: 8ec7bfc6644aff011545dfb0f5a415e79d7b0844)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/expect/expect/run-ptest

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-out_put=`tclsh tests/all.tcl -verbose bpse`
+out_put=`tclsh8 tests/all.tcl -verbose bpse`
 echo
 echo "${out_put}" | awk '/PASSED|FAILED|SKIPPED/{gsub(/PASSED/,"PASS"); gsub(/FAILED/,"FAIL"); gsub(/SKIPPED/,"SKIP"); if ($NF=="PASS"){print $NF": "$(NF-1)}else{print $NF": "$2}}' | uniq
 

meta/recipes-devtools/expect/expect_5.45.4.bb

@@ -13,8 +13,8 @@ SECTION = "devel"
 
 LIC_FILES_CHKSUM = "file://license.terms;md5=fbf2de7e9102505b1439db06fc36ce5c"
 
-DEPENDS += "tcl"
-RDEPENDS:${PN} = "tcl"
+DEPENDS += "tcl8"
+RDEPENDS:${PN} = "tcl8"
 
 inherit autotools update-alternatives ptest