libpciaccess: Changes to 'master'

[Gaetan Nadon]

 configure.ac        |    2 +-
 m4/ac_define_dir.m4 |   49 -------------------------------------------------
 m4/ax_define_dir.m4 |   49 +++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 50 insertions(+), 50 deletions(-)

New commits:
commit 555772964820d88f9481eb48d0431dddd8ba7aa5
Author: Gaetan Nadon <memsize at videotron.ca>
Date:   Sat Aug 21 19:54:04 2010 -0400

    config: upgrade AC_DEFINE_DIR to AX_DEFINE_DIR
    
    Use the latest version now hosted by GNU.
    The renaming protects Autoconf namespace.
    There is no functional change in the macro.
    
    Signed-off-by: Gaetan Nadon <memsize at videotron.ca>