add missing headers to dist - fixes problems with rpm builds

lnet/include/libcfs/Makefile.am

 SUBDIRS := darwin linux
 
-EXTRA_DIST := libcfs.h list.h lltrace.h kp30.h portals_utils.h portals_lib.h
+EXTRA_DIST := libcfs.h list.h lltrace.h kp30.h portals_utils.h portals_lib.h \
+        curproc.h user-lock.h user-prim.h user-time.h

lnet/include/libcfs/linux/Makefile.am

 EXTRA_DIST := linux-fs.h linux-prim.h portals_lib.h kp30.h		\
 	linux-lock.h lltrace.h portals_utils.h libcfs.h linux-mem.h	\
-	portals_compat25.h
+	portals_compat25.h linux-time.h