(ITS#3486) 2.3 rewrite overlay fails to build

[hyc@OpenLDAP.org]

Full_Name: Howard Chu
Version: 2.3 alpha
OS: Linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (24.126.120.178)
Submitted by: hyc


When the rewrite overlay is built as a static module, slapd fails to link
because librewrite (also a static library) appears before liboverlays on the
link line. Since the traditional Unix linker only takes a single left-to-right
pass through the objects on its command line, it doesn't see the rewrite
dependencies from liboverlays until after it has already examined (and ignored)
librewrite.