64-bit work. Now 32-bit platforms get a 100% make test

64-bit work.  Now 32-bit platforms get a 100% make test
with -Duse64bits (using long long).
Tested in Solaris 2.6 sparc  RH Linux 6.0 x86
(and Digital IX 4.0D, to get a true 64-bit opinion).  Now e.g.
'print unpack "q", pack "q", 12345678901'
should work on such 32-bit platforms.
Still a lot of printf()s behind -D which wrongly assume
that %ld/%lx and (long) are a good combination.
Introducing a slew of new macros intended to be used in printf()
format strings: e. g. PERL_PRId64 is the string to be used
when printing an IV, printf("%" PERL_PRId64 "\n", iv).
The PRI... naming follows the C9X naming of <inttypes.h> macros.

p4raw-id: //depot/cfgperl@3861