Trac #29617: fix kenzo SPKG build.

The kenzo SPKG is using a deprecated interface to the asdf build
system. ECL has a backwards-compatibility shim, but it looks like
the compatibility is not 100%. Building kenzo throws the following
error with ecl-21.2.1:

  [kenzo-1.1.9] Condition of type: CASE-FAILURE
  [kenzo-1.1.9] :FASL fell through ECASE expression.
  [kenzo-1.1.9] Wanted one of (:SHARED-LIBRARY :DLL :STATIC-LIBRARY
  :LIB :FASB :IMAGE :PROGRAM).

Kenzo is instead passing in :FASL to that function. This commit
changes it to :FASB, because the option having the smallest
Levenshtein distance must be correct.

build/pkgs/kenzo/spkg-install.in

@@ -3,6 +3,12 @@ cd src
 # create a short lisp file with the instructions to load kenzo from ecl
 # This will compile the lisp files since it is the first time they are loaded
 
+# Kenzo v1.1.9 fails to build with modern versions of ECL/ASDF because
+# it's passing an invalid argument (:fasl) to make-build. We patch it
+# on-the-fly to pass a supported argument, :fasb, instead.
+sed -i 's/:fasl/:fasb/' compile.lisp \
+    || sdh_die "failed to update make-build invocation"
+
 ecl < compile.lisp
 
 # Install Kenzo into ECL's library directory.