Expunge the g_libexec variable

Signed-off-by: Tom Eastep <teastep@shorewall.net>

Shorewall/lib.cli-std

@@ -363,7 +363,7 @@ compiler() {
     local shorewallrc
     local shorewallrc1
 
-    pc=$g_libexec/shorewall/compiler.pl
+    pc=${LIBEXECDIR}/shorewall/compiler.pl
 
     if [ $(id -u) -ne 0 ]; then
 	if [ -z "$g_shorewalldir" -o "$g_shorewalldir" = /etc/$g_program ]; then
@@ -430,7 +430,7 @@ compiler() {
 	PERL=/usr/bin/perl
     fi
 
-    if [ $g_perllib = ${g_libexec}/shorewall ]; then
+    if [ $g_perllib = ${LIBEXECDIR}/shorewall ]; then
 	$PERL $debugflags $pc $options $@
     else
 	PERL5LIB=$g_perllib