Initial AIX build support.
Initial OS interface in platform-aix.cc.
Use -gxcoff debugging option on AIX.
Add support for AIX.
Define AtomicWord as Atomic32 on AIX.
Test _ARCH_PPC on AIX.
Undef UNKNOWN, FALSE and TRUE leaked into public identifier space
by AIX header.
Define AtomicWord as Atomic32 on AIX.
Configure additional platform sources for AIX.
Add AIX to GuessOS and ppc for GuessArchitecture.
Add AIX to OSes that need d8-posix.cc.
Choose available mmap address range for AIX.
32 bit AIX frame alignment is 8 bytes.
Change MAP_ANON to MAP_ANONYMOUS.
Use mprotect() to change mapping protections in CommitRegion
and UnCommitRegion.
Revert _ARCH_PPC now that globals.h uses common __PPC__.
Add myself and IBM.
Explicitly mention PowerLinux and AIX
Update copyright year.
Add function to generate function descriptors.
Prepend function descriptor to code generated by GenerateBody.

Conflicts:

	src/ppc/code-stubs-ppc.cc
Use %ld / %lx format for pointers on AIX to fix warnings.
Try to relocate code address.
Revert werror change for AIX.