toolchain/crosstool-NG: update to 1.13.2

crosstool-NG 1.13.2 contains an important fix related to building
the ncurses libraries: the latest ncurses version requires tic to
be either in ${TIC_PATH}, or to be exactly /usr/bin/tic.

Also contains a few minor fixes:
 - CLooG extraction
 - prescott is a i686

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>