build: move opkg host dependency from package/install to package/compile

Improves parallel build behavior, since it allows opkg to be built at
the same time as other packages

Signed-off-by: Felix Fietkau <[email protected]>

package/Makefile

@@ -56,7 +56,9 @@ $(curdir)/merge:
 $(curdir)/merge-index: $(curdir)/merge
 	(cd $(PACKAGE_DIR_ALL) && $(SCRIPT_DIR)/ipkg-make-index.sh . 2>&1 > Packages; )
 
-$(curdir)/install: $(TMP_DIR)/.build $(curdir)/system/opkg/host/compile $(curdir)/merge $(if $(CONFIG_TARGET_PER_DEVICE_ROOTFS),$(curdir)/merge-index)
+$(curdir)/compile: $(curdir)/system/opkg/host/compile
+
+$(curdir)/install: $(TMP_DIR)/.build $(curdir)/merge $(if $(CONFIG_TARGET_PER_DEVICE_ROOTFS),$(curdir)/merge-index)
 	- find $(STAGING_DIR_ROOT) -type d | $(XARGS) chmod 0755
 	rm -rf $(TARGET_DIR) $(TARGET_DIR_ORIG)
 	[ -d $(TARGET_DIR)/tmp ] || mkdir -p $(TARGET_DIR)/tmp