Fix the ppc32 special-instruction magic sequence so it really does
preserve the value of r0, as claimed.  Fixes #278808 (Valgrind side).



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13797 a5019735-40e9-0310-863c-91ae7b9d1cf9
Ignore executable. Should have been part of r13791.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13798 a5019735-40e9-0310-863c-91ae7b9d1cf9
- Handle KVM_CREATE_IRQCHIP, which does not take any parameter
  and returns 0 or -1.
- white space fixes around the KVM ioctls


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13799 a5019735-40e9-0310-863c-91ae7b9d1cf9