Mips defines CONFIG_ARCH_WANT_IPC_PARSE_VERSION for both 32 and 64-bit.
See arch/mips/Kconfig. Other supported arches do it for 32-bit only.
This translates in having to pass IPC_64 flag for mips32 and mips64.
We use __mips__ to pass the flag, which is also defined for both 32 and
64-bit.
Change fixes bionic smoke tests (sys_msg, sys_sem, sys_shm) for mips64.
Test: bionic-unit-tests --gtest_filter="sys_*.smoke"
Change-Id: I918e4ffafd2002bb3e62ee252406746778100031
Also fix <sys/ipc.h>.
Not useful except to systems/bringup folks for testing. Trivial tests
added, and double-checked under strace to see that things look right.
x86 -- which works differently to everything else -- tested on the host.
Bug: http://b/27952303
Change-Id: I328534e994ae9e90755f545478fba03038c0bb94
