build: make Host/Install/Default use Host/Compile/Default with an extra argument

Allows parallelizing compile steps that might be necessary during install

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

include/host-build.mk

@@ -108,7 +108,7 @@ define Host/Compile
 endef
 
 define Host/Install/Default
-	$(_SINGLE)$(MAKE) -C $(HOST_BUILD_DIR) install
+	$(call Host/Compile/Default,install)
 endef
 
 define Host/Install