Silence annoying warnings from GNU ar
Silence annoying warnings from GNU ar

In (very) modern versions of binutils, for instance v2.25.1 in Ubuntu
15.10, complain about VERY common `crus` argument.  This patch attempts
to silence this noise:

    $ make -j5
      CC      uev.o
      CC      io.o
      CC      timer.o
      CC      signal.o
      ARCHIVE libuev.a
      LINK    libuev.so.1
    ar: `u' modifier ignored since `D' is the default (see `U')

Signed-off-by: Joachim Nilsson <583c295fd7602c168ad814279bbc3894ba65f5d6@gmail.com>

troglobit/libuev,troglobit/libuev