Changes to support AIX shared libraries. The interactions

	Changes to support AIX shared libraries.  The interactions
between configure.in and Makefile.in change significantly for shared
libraries: the static library target is no longer specified in the
Makefile, although a rule to make the static library is specified.
Also, none of the libraries have any more unresolved symbols.  As
discussed, libcom_err.a is made shared and symlinks are created in
lib.

	These changes sort of work, although I suspect cleanup is
necessary.  I don't think it breaks too much on other platforms.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@6126 dc483132-0cff-0310-8789-dd5450dbe970