[Mingw-cross-env-list] id3lib using native ar

[Tony Theodore]

id3lib is failing on OSX with a "Malformed archive" error (much the
same as gsoap) caused by using the native ar instead of the cross-ar.
However, none of the following seem to solve the problem, and I'm
stuck:

adding AC_CHECK_TOOL([AR], [ar], [:]) to configure.in before autoconf
- this causes ./configure to check for a cross-ar
configuring wth ac_cv_prog_AR='$(TARGET)-ar' or
ac_cv_prog_ac_ct_AR='$(TARGET)-ar' - to override the detection
making with AR='$(TARGET)-ar' - to override any previous setting

It seems none of the Makefiles have an AR variable, it must be hard
coded somewhere, but I can't see where.

This should be the same on all systems, a search in your log for 'ar
cru' should show it's using the native ar.

Tony