kexec-tools: build by default, even if CONFIG_KERNEL_KEXEC is unset

Helps find build issues and makes the package available on snapshot
builds

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/boot/kexec-tools/Makefile

@@ -24,7 +24,7 @@ include $(INCLUDE_DIR)/package.mk
 define Package/kexec-tools
   SECTION:=utils
   CATEGORY:=Utilities
-  DEPENDS:=@KERNEL_KEXEC @armeb||@arm||@i386||@x86_64||@powerpc64||@mipsel||@mips +KEXEC_ZLIB:zlib +KEXEC_LZMA:liblzma
+  DEPENDS:=@armeb||@arm||@i386||@x86_64||@powerpc64||@mipsel||@mips +KEXEC_ZLIB:zlib +KEXEC_LZMA:liblzma
   TITLE:=Kernel boots kernel
   URL:=http://kernel.org/pub/linux/kernel/people/horms/kexec-tools/
   MAINTAINER:=Florian Fainelli <florian@openwrt.org>