Patch pour trouver tcl/tk 8.2/8.3 sur certains Debians (PR#331)

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@3484 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02

configure

@@ -921,6 +921,14 @@ else
     tk_defs=-I/usr/local/include
     tcl_version=`sh ./runtest $tk_defs tclversion.c 2> /dev/null`
   fi
+  if test -z "$tcl_version"; then
+    tk_defs="-I/usr/include/tcl8.2 -I/usr/include/tk8.2"
+    tcl_version=`sh ./runtest $tk_defs tclversion.c 2> /dev/null`
+  fi
+  if test -z "$tcl_version"; then
+    tk_defs="-I/usr/include/tcl8.3 -I/usr/include/tk8.3"
+    tcl_version=`sh ./runtest $tk_defs tclversion.c 2> /dev/null`
+  fi
   if test -n "$tcl_version"; then
     echo "tcl.h version $tcl_version found."
     case $tcl_version in