(ITS#3965) slapo-rwm dependencies not detected correctly

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: HEAD
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (131.175.154.56)
Submitted by: ando


slapo-rwm dependencies are written for the .lo files instead of the .o files. 
This occurs because slapo-rwm is made of multiple files, so the generation of
the related objects goes thru the definition of an intermediate object, rwm_x.o

p.