make: unifdef for NSE (undefined)

*** 23,33 ****
          macro.o         \
          main.o          \
          make.o          \
          misc.o          \
          nse_printdep.o  \
-         nse.o           \
          parallel.o      \
          pmake.o         \
          read.o          \
          read2.o         \
          rep.o           \
--- 23,32 ----