Deps: Add a project-specific patch for hut

Hut has both a Makefile and erlang.mk but the default target
does not build the project. To fix a few packages we have a
special patch HUT_PATCH that will call the appropriate target.

core/deps.mk

@@ -206,6 +206,9 @@ ifneq ($(ALL_DEPS_DIRS),)
 			echo $$dep >> $(ERLANG_MK_TMP)/deps.log; \
 			if [ -z "$(strip $(FULL))" ] $(if $(force_rebuild_dep),&& ! ($(call force_rebuild_dep,$$dep)),) && [ ! -L $$dep ] && [ -f $$dep/ebin/dep_built ]; then \
 				:; \
+			elif [ "$$dep" = "$(DEPS_DIR)/hut" -a "$(HUT_PATCH)" ]; then \
+				$(MAKE) -C $$dep app IS_DEP=1; \
+				if [ ! -L $$dep ] && [ -d $$dep/ebin ]; then touch $$dep/ebin/dep_built; fi; \
 			elif [ -f $$dep/GNUmakefile ] || [ -f $$dep/makefile ] || [ -f $$dep/Makefile ]; then \
 				$(MAKE) -C $$dep IS_DEP=1; \
 				if [ ! -L $$dep ] && [ -d $$dep/ebin ]; then touch $$dep/ebin/dep_built; fi; \

doc/src/guide/deps.asciidoc

@@ -559,8 +559,8 @@ performed:
 * Run autopatch on the project
 
 Autopatch first checks if there is any project-specific patch
-enabled. There is currently one: `ELIXIR_PATCH` for the `elixir`
-dependency.
+enabled. There are currently two: `ELIXIR_PATCH` for the `elixir`
+dependency and `HUT_PATCH` for the `hut` dependency.
 
 Otherwise, autopatch performs different operations depending
 on the kind of project it finds the dependency to be.

test/Makefile

@@ -167,6 +167,7 @@ $(eval $(foreach t,$(patsubst %.mk,%,$(patsubst plugin_%,%,$(wildcard plugin_*.m
 # Packages.
 
 PACKAGES = $(foreach pkg,$(sort $(wildcard ../index/*.mk)),$(notdir $(basename $(pkg))))
+PATCHES = HUT_PATCH=1
 EXCLUDE_FROM_CHECK = ['ci.erlang.mk', elvis_mk, esh_mk, hexer_mk, inaka_mk, 'lfe.mk', rust_mk]
 EXCLUDE_FROM_APP_CHECK = esh_mk rust_mk