[bench_mulredc.c,Makefile.am] fix for --disable-asm-redc
[NEWS] added new items
[longlong.h] copied umul_ppmm code for MIPS from GMP 5.0.4
[mpmod.c] now use mulredc_1 when available
[pm1fs2.c] fixed issue when sizeof(unsigned long) < sizeof(sp_t)


git-svn-id: svn://scm.gforge.inria.fr/svnroot/ecm/trunk@1817 404564d9-a503-0410-82bf-e18ce2cf3989