toolchain-crosstool-ng: update PPL and CLoog versions in default configs

We have updated our Crosstool-NG configuration to gcc 4.6.x, but the
PPL and CLoog versions were not updated accordingly. With gcc 4.6.x,
at least PPL 0.11 is needed, and only CLoog > 0.15.9 can work with PLL
0.11.

Fixes:

  http://autobuild.buildroot.org/results/c22758a30c3b8abb582150cefd7099605c527e14/build-end.log



Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>