tools: make zstd tool core and xz tool non-core

Make zstd tool core and xz tool non-core since zstd is the new default
for compression format.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

tools/Makefile

@@ -67,9 +67,9 @@ tools-y += quilt
 tools-y += squashfs4
 tools-y += sstrip
 tools-y += util-linux
+tools-y += xz
 tools-y += zip
 tools-y += zlib
-tools-y += zstd
 tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS),y) += liblzo
 tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS)$(BUILD_B43_TOOLS),y) += b43-tools
 tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS)$(BUILD_BZIP2_TOOLS),y) += bzip2
@@ -153,22 +153,21 @@ endif
 # dependency for tools which have patches directory
 $(foreach tool, $(tools-y), $(if $(wildcard $(curdir)/$(tool)/patches),$(eval $(curdir)/$(tool)/compile += $(curdir)/patch/compile)))
 
-$(foreach tool, $(filter-out xz,$(tools-y)), $(eval $(curdir)/$(tool)/compile += $(curdir)/xz/compile))
+$(foreach tool, $(filter-out zstd,$(tools-y)), $(eval $(curdir)/$(tool)/compile += $(curdir)/zstd/compile))
 
 # make any tool depend on the following to ensure that archives can be unpacked and patched properly
 tools-core += libdeflate
 tools-core += patch
 tools-core += tar
-tools-core += xz
+tools-core += zstd
 
 $(foreach tool, $(tools-y), $(eval $(curdir)/$(tool)/compile += $(patsubst %,$(curdir)/%/compile,$(tools-core))))
 tools-y += $(tools-core)
 
 # make core tools depend on sed and flock
-$(foreach tool, $(filter-out xz,$(tools-core)), $(eval $(curdir)/$(tool)/compile += $(curdir)/sed/compile))
-$(curdir)/xz/compile += $(curdir)/flock/compile
+$(foreach tool, $(filter-out zstd,$(tools-core)), $(eval $(curdir)/$(tool)/compile += $(curdir)/sed/compile))
 
-$(curdir)/sed/compile := $(curdir)/flock/compile $(curdir)/xz/compile
+$(curdir)/sed/compile := $(curdir)/flock/compile $(curdir)/zstd/compile
 tools-y += flock sed
 
 $(curdir)/autoremove := 1