Use standard Versions.def for libprocstat.

This makes the versions inheritance consistent for our versioned libraries.

Extracted from:	ino64
Discussed with:	kan
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

lib/libprocstat/Makefile

@@ -13,7 +13,7 @@ SRCS=	cd9660.c	\
 	smbfs.c		\
 	udf.c
 
-VERSION_DEF=	${.CURDIR}/Versions.def
+VERSION_DEF=	${LIBCSRCDIR}/Versions.def
 SYMBOL_MAPS=	${.CURDIR}/Symbol.map
 
 INCS=		libprocstat.h

lib/libprocstat/Versions.def

@@ -1,10 +0,0 @@
-# $FreeBSD$
-
-# This version was first added to 9.0-current.
-FBSD_1.2 {
-};
-
-# This version was first added to 10.0-current.
-FBSD_1.3 {
-} FBSD_1.2;
-