fix module linking on AIX

[Roylance, Stephen D.]

The following patch to configure.in changes LDSHFLAGS to allow enresolved
external references.
*** ../../../cvs2/samba/source/configure.in     Wed Apr 16 09:10:52 2003
--- configure.in        Tue Apr 15 09:49:10 2003
***************
*** 996,1002 ****
                        ;;
                *aix*) AC_DEFINE(AIX,1,[Whether the host os is aix])
                        BLDSHARED="true"
!                       LDSHFLAGS="-Wl,-bexpall,-bM:SRE,-bnoentry"
                        DYNEXP="-Wl,-brtl,-bexpall"
                        PICFLAG="-O2"
                        if test "${GCC}" != "yes"; then
--- 996,1002 ----
                        ;;
                *aix*) AC_DEFINE(AIX,1,[Whether the host os is aix])
                        BLDSHARED="true"
!                       LDSHFLAGS="-Wl,-bexpall,-bM:SRE,-bnoentry,-berok"
                        DYNEXP="-Wl,-brtl,-bexpall"
                        PICFLAG="-O2"
                        if test "${GCC}" != "yes"; then

I'm not sure if this is correct, but it allows HEAD to build for me on AIX 5.1

-Steve