Allow depend creation again. This doesn't work on GNU make, but does on all others.

src/libeinfo/Makefile

@@ -9,6 +9,8 @@ VERSION_MAP=	einfo.map
 
 SHLIBDIR=		/${LIBNAME}
 
+CFLAGS+=		-I$(TOPDIR)
+
 include $(TOPDIR)/cc.mk
 include $(TOPDIR)/lib.mk
 include $(TOPDIR)/$(TERMCAP).mk

src/libeinfo/libeinfo.c

@@ -50,7 +50,7 @@ const char libeinfo_copyright[] = "Copyright (c) 2007-2008 Roy Marples";
 #include <unistd.h>
 
 #include "einfo.h"
-#include "../hidden-visibility.h"
+#include "hidden-visibility.h"
 hidden_proto(ecolor)
 hidden_proto(ebegin)
 hidden_proto(ebeginv)