[Bug-gnulib] full-write.c / full-read.c consolidation

[Jim Meyering]

Any objection to this?

        * full-write.c: Rework so that it may serve to define full_read, too.
        * full-read.c: Simply #define FULL_READ and include full-write.c.

With the above change, full-read.c is just two lines (modulo copyright):

  #define FULL_READ
  #include "full-write.c"

And here's full-write.c:

full-write.c
Description: Text document