[PATCH] docs: fix check-docs with WITH_BREAKING_CHANGES

[Junio C Hamano <gitster@pobox.com>]

We correctly omit builtin/pack-objects.o from BUILTIN_OBJS, but
forgot to add "git pack-redundant" on the EXCLUDED_PROGRAMS list,
which made "make check-docs" target notice that the command has been
removed but still is documented.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 * The command is still listed in the resulting "git help git"
   output, as cmd-list.perl does not yet know which commands on the
   list are to be ignored under WITH_BREAKING_CHANGES.

 Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git c/Makefile w/Makefile
index a9b2de0692..95ac0820e9 100644
--- c/Makefile
+++ w/Makefile
@@ -1283,7 +1283,9 @@ BUILTIN_OBJS += builtin/mv.o
 BUILTIN_OBJS += builtin/name-rev.o
 BUILTIN_OBJS += builtin/notes.o
 BUILTIN_OBJS += builtin/pack-objects.o
-ifndef WITH_BREAKING_CHANGES
+ifdef WITH_BREAKING_CHANGES
+EXCLUDED_PROGRAMS += git-pack-redundant
+else
 BUILTIN_OBJS += builtin/pack-redundant.o
 endif
 BUILTIN_OBJS += builtin/pack-refs.o