kbuild: deb-pkg: do not run headers_check

It is absolutely fine to add extra sanity checks in package scripts,
but it is not necessary to do so.

This is already covered by the daily compile-testing (0day bot etc.)
because headers_check is run as a part of the normal build process
when CONFIG_HEADERS_CHECK=y.

Replace it with the newly-added "make headers".
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

scripts/package/builddeb

@@ -130,7 +130,7 @@ if is_enabled CONFIG_MODULES; then
 fi
 
 if [ "$ARCH" != "um" ]; then
-	$MAKE -f $srctree/Makefile headers_check
+	$MAKE -f $srctree/Makefile headers
 	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH="$libc_headers_dir/usr"
 fi