Revert r258672. We clearly don't compile libraries enough times.

UPDATING

@@ -31,13 +31,6 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 11.x IS SLOW:
 	disable the most expensive debugging functionality run
 	"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
-20131126:
-	WITH_LIB32 has been changed to WITHOUT_LIB32 by default.  You
-	can set WITH_LIB32=yes in make.conf or src.conf, or if you need
-	to do a quick 32 bit library build you can do a 'make build32'
-	and 'make install32' as a separate step AFTER doing a
-	buildworld/installworld.
-
 20131108:
 	The WITHOUT_ATF build knob has been removed and its functionality
 	has been subsumed into the more generic WITHOUT_TESTS.  If you were

share/mk/bsd.own.mk

@@ -303,6 +303,7 @@ __DEFAULT_YES_OPTIONS = \
     LDNS \
     LDNS_UTILS \
     LEGACY_CONSOLE \
+    LIB32 \
     LIBPTHREAD \
     LIBTHR \
     LOCALES \
@@ -368,7 +369,6 @@ __DEFAULT_NO_OPTIONS = \
     GPL_DTC \
     HESIOD \
     INSTALL_AS_USER \
-    LIB32 \
     LLDB \
     NAND \
     OFED \