package/zstd: disable ccache for host package

We need to disable ccache when building host-zstd as the upcoming
ccache update depends on host-zstd.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
[yann.morin.1998@free.fr: introduce HOST_ZSTD_ENV]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/zstd/zstd.mk

@@ -96,14 +96,18 @@ define ZSTD_INSTALL_TARGET_CMDS
 endef
 
 HOST_ZSTD_OPTS += PREFIX=$(HOST_DIR)
+HOST_ZSTD_ENV = $(HOST_MAKE_ENV) $(HOST_CONFIGURE_OPTS)
+
+# We are a ccache dependency, so we can't use ccache
+HOST_ZSTD_ENV += CC="$(HOSTCC_NOCCACHE)" CXX="$(HOSTCXX_NOCCACHE)"
 
 define HOST_ZSTD_BUILD_CMDS
-	$(HOST_MAKE_ENV) $(HOST_CONFIGURE_OPTS) $(MAKE) $(HOST_ZSTD_OPTS) \
+	$(HOST_ZSTD_ENV) $(MAKE) $(HOST_ZSTD_OPTS) \
 		-C $(@D) zstd-release lib-release
 endef
 
 define HOST_ZSTD_INSTALL_CMDS
-	$(HOST_MAKE_ENV) $(HOST_CONFIGURE_OPTS) $(MAKE) $(HOST_ZSTD_OPTS) \
+	$(HOST_ZSTD_ENV) $(MAKE) $(HOST_ZSTD_OPTS) \
 		-C $(@D) install
 endef