AM_PROG_AR added for the newest automake
AM_PROG_AR added for the newest automake

Needed on Fedora 18, at least. Will generate a warninig on older platforms,
like EL6, but will not prevent build.

Fixes these error messages during autoreconf:

    linking libtool libraries using a non-POSIX \
    /usr/share/automake-1.12/am/ltlibrary.am: archiver requires \
    'AM_PROG_AR' in 'configure.ac'

Yubico/yubikey-personalization,eworm-de/yubikey-personalization,dmitriykuptsov/yubikey-personalization,Yubico/yubikey-personalization-dpkg,eworm-de/yubikey-personalization,eworm-de/yubikey-personalization,dmitriykuptsov/yubikey-personalization,Yubico/yubikey-personalization-dpkg,Yubico/yubikey-personalization-dpkg,Yubico/yubikey-personalization,dmitriykuptsov/yubikey-personalization