NLS: Fix backend gettext triggers

The backend also needs to pull in translations from the frontend
pg_log_*() functions, since some files in src/common/ use those.

src/nls-global.mk

@@ -54,6 +54,7 @@ GETTEXT_FLAGS    += _:1:pass-c-format
 
 # common settings that apply to backend and all backend modules
 BACKEND_COMMON_GETTEXT_TRIGGERS = \
+    $(FRONTEND_COMMON_GETTEXT_TRIGGERS) \
     errmsg errmsg_plural:1,2 \
     errdetail errdetail_log errdetail_plural:1,2 \
     errhint \
@@ -62,6 +63,7 @@ BACKEND_COMMON_GETTEXT_TRIGGERS = \
     MultiXactIdWait:6 \
     ConditionalMultiXactIdWait:6
 BACKEND_COMMON_GETTEXT_FLAGS = \
+    $(FRONTEND_COMMON_GETTEXT_FLAGS) \
     errmsg:1:c-format errmsg_plural:1:c-format errmsg_plural:2:c-format \
     errdetail:1:c-format errdetail_log:1:c-format errdetail_plural:1:c-format errdetail_plural:2:c-format \
     errhint:1:c-format \