minor fix for lwp/Makefile.in

[Derrick J Brashear]

This is required when you run configure from an alternate build directory
(at least on Solaris 2.6)
*** Makefile.in~        Sat Jan  1 21:38:05 2000
--- lwp/Makefile.in Fri Jan 14 14:50:32 2000
***************
*** 99,104 ****
--- 99,105 ----
  timer.o: timer.c
  fasttime.o: fasttime.c
  q.o: q.c
+ rw.o: rw.c
  testprocess.o:        testprocess.c
  testlwp.o: testlwp.c
  
-D