[Buildroot] Package ace_of_penguins sets unneeded variable

[hartleys]

Hello all,

The ace_of_penguins package sets:

ACE_OF_PENGUINS_CONF_OPT = --target=$(GNU_TARGET_NAME) \
		--host=$(GNU_TARGET_NAME) --build=$(GNU_HOST_NAME) \
		--prefix=/usr --sysconfdir=/etc

This appears to be unnecessary since Makefile.autotools.in sets those
automatically:

	cd $(@D)/$($(PKG)_SUBDIR) && rm -f config.cache && \
	$(TARGET_CONFIGURE_OPTS) \
	$(TARGET_CONFIGURE_ARGS) \
	$($(PKG)_CONF_ENV) \
		./configure \
		--target=$(GNU_TARGET_NAME) \
		--host=$(GNU_TARGET_NAME) \
		--build=$(GNU_HOST_NAME) \
		--prefix=/usr \
		--exec-prefix=/usr \
		--sysconfdir=/etc \
		$(if $(findstring s,$(MAKEFLAGS)),--quiet,)
		$($(PKG)_CONF_OPT)

Hartley