Sigh, finally activate pkgwrap.c.

Big pointy hat to:	sobomax (who apparently needs some sleep)
Submitted by:		walt <wa1ter@hotmail.com>

usr.sbin/pkg_install/lib/Makefile

@@ -3,7 +3,7 @@
 LIB=	install
 INTERNALLIB= YES
 SRCS=	file.c msg.c plist.c str.c exec.c global.c pen.c match.c \
-	deps.c version.c
+	deps.c version.c pkgwrap.c
 
 CFLAGS+= ${DEBUG}