Fix building MPFR >= 2.4.0.

/trunk/scripts/build/mpfr.sh | 51 29 22 0 ++++++++++++++++++++++++++++----------------------
1 file changed, 29 insertions(+), 22 deletions(-)

 # Compute IA-64-specific values

 CT_DoArchTupleValues() {

     # The architecture part of the tuple:

     CT_TARGET_ARCH="${CT_ARCH}"

 }