insane.bbclass: Trigger unrecognzed configure option for meson

insane.bbclass: Trigger unrecognzed configure option for meson

Tested with 'unknown-configure-option' in ERROR_QA:

For meson (glib-2.0-native):
1. add 'EXTRA_OEMESON_append = "-Dschnitzel=true -Dwurst=true"'
   | ERROR: glib-2.0-native-1_2.58.3-r0 do_configure: QA Issue: glib-2.0-native: configure was passed unrecognised options: schnitzel wurst [unknown-configure-option]
2. add 'UNKNOWN_CONFIGURE_WHITELIST_append=" schnitzel"'
   | ERROR: glib-2.0-native-1_2.58.3-r0 do_configure: QA Issue: glib-2.0-native: configure was passed unrecognised options: wurst [unknown-configure-option]
3. change to 'UNKNOWN_CONFIGURE_WHITELIST_append=" schnitzel wurst"'
   => builds without issues

For autotools (readline-native):
1. add 'EXTRA_OECONF = "--with-schnitzel --with-wurst"'
   | ERROR: readline-native-8.0-r0 do_configure: QA Issue: readline-native: configure was passed unrecognised options: --with-wurst --with-schnitzel [unknown-configure-option]
2. add 'UNKNOWN_CONFIGURE_WHITELIST_append=" --with-schnitzel"'
   | ERROR: readline-native-8.0-r0 do_configure: QA Issue: readline-native: configure was passed unrecognised options: --with-wurst [unknown-configure-option]
3. add 'UNKNOWN_CONFIGURE_WHITELIST_append=" --with-schnitzel --with-wurst"'
   => builds without issues

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>