tools/console: correct make dependencies for _paths.h

Correct dependencies for _paths.h to avoid build failure with make -j.
Only main.c requires _paths.h. This fixes commit 8398ec70 ("xenconsole:
Ensure exclusive access to console using locks")

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
(cherry picked from commit 77fec3a67b)

tools/console/Makefile

@@ -29,7 +29,8 @@ distclean: clean
 xenconsoled: $(patsubst %.c,%.o,$(wildcard daemon/*.c))
 	$(CC) $(LDFLAGS) $^ -o $@ $(LDLIBS) $(LDLIBS_xenconsoled) $(APPEND_LDFLAGS)
 
-xenconsole: client/_paths.h $(patsubst %.c,%.o,$(wildcard client/*.c))
+client/main.o: client/_paths.h
+xenconsole: $(patsubst %.c,%.o,$(wildcard client/*.c))
 	$(CC) $(LDFLAGS) $^ -o $@ $(LDLIBS) $(LDLIBS_xenconsole) $(APPEND_LDFLAGS)
 
 genpath-target = $(call buildmakevars2header,client/_paths.h)