Cherry-pick merge from mysql-5.1-bugteam.

Original revision:
------------------------------------------------------------
revision-id: kent.boortz@sun.com-20100204182709-dw1dwpglkd5qrehb
committer: Kent Boortz <kent.boortz@sun.com>
branch nick: mysql-5.1-bugteam
timestamp: Thu 2010-02-04 19:27:09 +0100
message:
  LT_INIT and LT_PREREQ was added in libtool 2.2 2008, a bit too
  recent, switched back to the older AC_PROG_LIBTOOL
------------------------------------------------------------

configure.in

@@ -14,8 +14,7 @@ AC_CANONICAL_SYSTEM
 # TAR files, the path name is split into two parts, a 155 chacater
 # first part and a 100 character second part.
 AM_INIT_AUTOMAKE([1.9 tar-ustar])
-LT_INIT
-LT_PREREQ([1.5.6])
+AC_PROG_LIBTOOL
 
 AM_CONFIG_HEADER([include/config.h])