gmime : removed dolt

gmime : removed dolt

Fixed compilation removing DOLT (from http://dolt.freedesktop.org/)
  from configure.in, else it would file like this(output stripped):
  .../doltlibtool: exec: .../libtool: cannot execute: No such file or directory
  note that it looks for libtool and not
  ${TARGET_ARCH}-angstrom-linux-libtool in my case,more informations
  are disponible reading the m4 dolt file here:
  http://cgit.freedesktop.org/dolt/tree/dolt.m4
Note that we don't bump pr as it was a compile failure and that we
  didn't modify things that would create a modified binary