package/pkg-autotools: remove redundant configs

Since the following commit:
https://github.com/buildroot/buildroot/commit/b07030a708293756e25edd6432ed02cc53ff758e

The following host configs are included with $$(HOST_CONFIGURE_OPTS)
	CFLAGS="$$(HOST_CFLAGS)"
	LDFLAGS="$$(HOST_LDFLAGS)"

As they are redundant, we can remove them from the autotools infrastructure.

Signed-off-by: Neal Frager <neal.frager@amd.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/pkg-autotools.mk

@@ -200,8 +200,6 @@ else
 define $(2)_CONFIGURE_CMDS
 	(cd $$($$(PKG)_SRCDIR) && rm -rf config.cache; \
 	$$(HOST_CONFIGURE_OPTS) \
-	CFLAGS="$$(HOST_CFLAGS)" \
-	LDFLAGS="$$(HOST_LDFLAGS)" \
 	$$($$(PKG)_CONF_ENV) \
 	CONFIG_SITE=/dev/null \
 	./configure \