ci: more autoconf for codeql

Signed-off-by: Robin H. Johnson <[email protected]>

.github/workflows/codeql.yaml

@@ -85,6 +85,7 @@ jobs:
       run: |
         sudo apt-get -qy update || exit 1
         DEBIAN_FRONTEND=noninteractive sudo apt-get -qy install autoconf automake bison build-essential check clang flex gettext libtool pkg-config libbsd-dev libbsd0 systemd || exit 1
+        autoupdate -v # Scans run on newer Ubuntu deliberately
         ./autogen.sh || exit 1
         ./configure --with-check || exit 1
         make -j all || exit 1 # If both all & check_all are together, triggers race condition w/ scanner.l & gram.y

configure.ac

@@ -109,7 +109,7 @@ fi
 dnl Not needed
 AC_PATH_PROG(LN, ln)
 AC_PROG_YACC
-AM_PROG_LEX
+AM_PROG_LEX # add (noyywrap) after ubuntu 20.04 is no longer supported
 AC_PATH_PROG(TAR, tar)
 AC_PATH_PROG(GZIP, gzip)