Bug 1586357 - Only force re-linking on 1-tier PGO builds; r=firefox-build-system-reviewers,chmanchester

Differential Revision: https://phabricator.services.mozilla.com/D48206

--HG--
extra : moz-landing-system : lando

config/rules.mk

@@ -470,6 +470,7 @@ endif
 endif
 endif
 
+ifdef MOZ_1TIER_PGO
 ifneq (,$(MOZ_PROFILE_GENERATE)$(MOZ_PROFILE_USE))
 ifneq (,$(filter target,$(MAKECMDGOALS)))
 ifdef GNU_CC
@@ -479,6 +480,7 @@ $(PROGRAM) $(SHARED_LIBRARY) $(LIBRARY): FORCE
 endif
 endif
 endif
+endif
 
 endif # NO_PROFILE_GUIDED_OPTIMIZE