cat: fix cap_rights_init usage

Capability rights passed to cap_rights_* are not simple bitmaks and
cannot be ORed together in general (although it will work for certain
subsets of rights).

PR:		277057
Reported by:	asomers, markj

(cherry picked from commit 05f530f4d2)

bin/cat/cat.c

@@ -155,7 +155,7 @@ init_casper(int argc, char *argv[])
 		err(EXIT_FAILURE, "unable to create Casper");
 
 	fa = fileargs_cinit(casper, argc, argv, O_RDONLY, 0,
-	    cap_rights_init(&rights, CAP_READ | CAP_FSTAT | CAP_FCNTL | CAP_SEEK),
+	    cap_rights_init(&rights, CAP_READ, CAP_FSTAT, CAP_FCNTL, CAP_SEEK),
 	    FA_OPEN | FA_REALPATH);
 	if (fa == NULL)
 		err(EXIT_FAILURE, "unable to create fileargs");