Make MPFR build under Cygwin.

/trunk/scripts/build/mpfr.sh | 24 20 4 0 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)

 # Compute IA-64-specific values

 CT_DoArchTupleValues() {

     # The architecture part of the tuple:

     CT_TARGET_ARCH="${CT_ARCH}"

 }