rescue: include ping iff at least one of INET & INET6 is enabled

Ping does not build (and serves no purpose) if neither is enabled
(i.e., building WITHOUT_INET and WITHOUT_INET6).

This is equvalent to a4ef9e58bc but for rescue/.

PR:		260082
Fixes:		a4ef9e58bc ("sbin: build ping if at least one of...")
Sponsored by:	The FreeBSD Foundation

rescue/rescue/Makefile

@@ -99,7 +99,7 @@ CRUNCH_PROGS_sbin= 						\
 	md5 mdconfig mdmfs mknod mount mount_cd9660		\
 	mount_msdosfs mount_nfs mount_nullfs			\
 	mount_udf mount_unionfs newfs				\
-	newfs_msdos nos-tun ping reboot				\
+	newfs_msdos nos-tun reboot				\
 	restore rcorder route savecore		 		\
 	shutdown swapon sysctl tunefs umount
 
@@ -107,6 +107,10 @@ CRUNCH_PROGS_sbin= 						\
 CRUNCH_PROGS_sbin+= ccdconfig
 .endif
 
+.if ${MK_INET} != "no" || ${MK_INET6} != "no"
+CRUNCH_PROGS_sbin+= ping
+.endif
+
 .if ${MK_INET6_SUPPORT} != "no"
 CRUNCH_ALIAS_ping= ping6
 CRUNCH_PROGS_sbin+= rtsol