package/exim: do not build perl-based utilities

Upstream added various utilities, for example exim_id_update
with commit https://github.com/Exim/exim/commit/46a36afae41f63de654269c8a0b7cf5852a85a14
which is a "Utility for one-time upgrage/downgrade between exim message-
id formats, around the 4.97 transition" which would add a dependency to
host-perl/perl so we build and install only the needed exim binary.

Fixes:

  http://autobuild.buildroot.net/results/111302dc3b4763befe9b159ae59b1b72de9162ea/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 9bf9cac489bfe313623d0382446a1504d4f75992)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/exim/exim.mk

@@ -144,16 +144,15 @@ define EXIM_BUILD_CMDS
 		CFLAGS="-std=c99 $(HOST_CFLAGS)" \
 		LFLAGS="-fPIC $(HOST_LDFLAGS)"
 	$(TARGET_MAKE_ENV) build=br $(MAKE) -C $(@D) $(EXIM_STATIC_FLAGS) \
-		CFLAGS="-std=c99 $(TARGET_CFLAGS) $(EXIM_CFLAGS)"
+		CFLAGS="-std=c99 $(TARGET_CFLAGS) $(EXIM_CFLAGS)" exim
 endef
 
 # Need to replicate the LFLAGS in install, as exim still wants to build
 # something when installing...
 define EXIM_INSTALL_TARGET_CMDS
-	DESTDIR=$(TARGET_DIR) INSTALL_ARG="-no_chown -no_symlink" build=br \
-	  $(MAKE) -C $(@D) $(EXIM_STATIC_FLAGS) \
-		CFLAGS="-std=c99 $(TARGET_CFLAGS)" \
-		install
+	cd $(@D)/build-br; \
+		DESTDIR=$(TARGET_DIR) build=br \
+		../scripts/exim_install -no_chown -no_symlink exim
 	chmod u+s $(TARGET_DIR)/usr/sbin/exim
 endef