Bug 1850647 - avoid using py_action with addprefix to enable wrapping…

… the actual command in BUILDSTATUS messages, r=glandium.

Differential Revision: https://phabricator.services.mozilla.com/D190513

Makefile.in

@@ -83,7 +83,7 @@ ifneq (,$(filter FasterMake+RecursiveMake,$(BUILD_BACKENDS)))
 	@# same directory, because that would blow up
 	$(if $(wildcard _build_manifests/install/$(subst /,_,$*)),$(if $(wildcard faster/install_$(subst /,_,$*)*),$(error FasterMake and RecursiveMake ends of the hybrid build system want to handle $*)))
 endif
-	$(addprefix $(call py_action,process_install_manifest,$(if $(filter copy,$(NSDISTMODE)),--no-symlinks )--track install_$(subst /,_,$*).track $*) ,$(wildcard _build_manifests/install/$(subst /,_,$*)))
+	$(foreach manifest,$(wildcard _build_manifests/install/$(subst /,_,$*)),$(call py_action,process_install_manifest,$(if $(filter copy,$(NSDISTMODE)),--no-symlinks )--track install_$(subst /,_,$*).track $* $(manifest)))
 
 # Dummy wrapper rule to allow the faster backend to piggy back
 $(addprefix install-,$(subst /,_,$(filter dist/%,$(install_manifests)))): install-dist_%: install-dist/% ;