configure: quote command line arguments in config.status

Make config.status generation a bit more robust.  (The quote_sh
function will also be reused to parse configure's command line
arguments in an external script driven by Meson build option
introspection).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -89,6 +89,10 @@ printf " '%s'" "$0" "$@" >> config.log
 echo >> config.log
 echo "#" >> config.log
 
+quote_sh() {
+    printf "%s" "$1" | sed "s,','\\\\'',g; s,.*,'&',"
+}
+
 print_error() {
     (echo
     echo "ERROR: $1"
@@ -6519,7 +6523,7 @@ preserve_env WINDRES
 
 printf "exec" >>config.status
 for i in "$0" "$@"; do
-  test "$i" = --skip-meson || printf " '%s'" "$i" >>config.status
+  test "$i" = --skip-meson || printf " %s" "$(quote_sh "$i")" >>config.status
 done
 echo ' "$@"' >>config.status
 chmod +x config.status