16081 Add another incompatibility between illumos and Solaris kernels.
git-svn-id: svn://svn.valgrind.org/valgrind/branches/VALGRIND_3_12_BRANCH@16090
syscalls [3]
- posix_spawn() functionality is backed up by true spawn() syscall on Solaris 12
whereas illumos and Solaris 11 leverage vfork()
+- illumos and older Solaris use utimesys() syscall whereas newer Solaris
+ uses utimensat()
[1] http://docs.oracle.com/cd/E26502_01/html/E28556/gkzlf.html#gkzip
[2] https://www.illumos.org/issues/521