build: support make tools/<name>/install again

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

include/host-build.mk

@@ -182,6 +182,7 @@ ifndef DUMP
   $(_host_target)host-prepare: $(HOST_STAMP_PREPARED)
   $(_host_target)host-configure: $(HOST_STAMP_CONFIGURED)
   $(_host_target)host-compile: $(HOST_STAMP_BUILT) $(HOST_STAMP_INSTALLED)
+  host-install: host-compile
 
   host-clean-build: FORCE
 	rm -rf $(HOST_BUILD_DIR) $(HOST_STAMP_BUILT)