readelf: Make -t imply -S, for compatibility with GNU binutils.

Reported by:	jhb
Reviewed by:	emaste
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D20475

contrib/elftoolchain/readelf/readelf.1

@@ -24,7 +24,7 @@
 .\"
 .\" $Id: readelf.1 3642 2018-10-14 14:24:28Z jkoshy $
 .\"
-.Dd September 13, 2012
+.Dd May 30, 2019
 .Dt READELF 1
 .Os
 .Sh NAME
@@ -113,6 +113,8 @@ Print symbol tables.
 .It Fl t | Fl -section-details
 Print additional information about sections, such as the flags
 fields in section headers.
+Implies
+.Fl S .
 .It Fl v | Fl -version
 Prints a version identifier for
 .Nm

contrib/elftoolchain/readelf/readelf.c

@@ -7500,7 +7500,7 @@ main(int argc, char **argv)
 			re->options |= RE_S;
 			break;
 		case 't':
-			re->options |= RE_T;
+			re->options |= RE_SS | RE_T;
 			break;
 		case 'u':
 			re->options |= RE_U;