complibs/ppl: fix build with newer gcc

ppl-0.10.x does not build with gcc-4.6+, as it uses constructs that were
warnings with gcc-4.5 and before, but are now errors with gcc-4.6 and
above.

Fix that by passing -fpermissive in CFLAGS for ppl 0.10.

Reported-by: Jeremy Rosen <jeremy.rosen@openwide.fr>
Reported-by: Peter Korsgaard <jacmet@uclibc.org>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

This is NOT the official version of dialog.  This version has been

significantly modified from the original.  It is for use by the Linux

kernel configuration script.  Please do not bother Savio Lam with 

questions about this program.