Inline functions in compat.c are not inlined

[shinderuk]

They probably should be in a header.

On Linux:

$ objdump -d pg_wait_sampling.so | grep -i 'call.*compat'
    3e4c:	e8 8f f7 ff ff       	callq  35e0 <shm_mq_detach_compat@plt>
    47b4:	e8 97 ef ff ff       	callq  3750 <CreateTemplateTupleDescCompat@plt>
    4ca4:	e8 37 e9 ff ff       	callq  35e0 <shm_mq_detach_compat@plt>
    4f01:	e8 4a e8 ff ff       	callq  3750 <CreateTemplateTupleDescCompat@plt>
    5282:	e8 c9 e4 ff ff       	callq  3750 <CreateTemplateTupleDescCompat@plt>
    5b52:	e8 89 da ff ff       	callq  35e0 <shm_mq_detach_compat@plt>
    5c51:	e8 0a da ff ff       	callq  3660 <shm_mq_send_compat@plt>
    5caa:	e8 b1 d9 ff ff       	callq  3660 <shm_mq_send_compat@plt>
    5d17:	e8 44 d9 ff ff       	callq  3660 <shm_mq_send_compat@plt>
    5d48:	e8 13 d9 ff ff       	callq  3660 <shm_mq_send_compat@plt>

On macOS:

% otool -tV pg_wait_sampling.so | grep -i 'call.*compat'
0000000000001a72	callq	_CreateTemplateTupleDescCompat
0000000000001eab	callq	_CreateTemplateTupleDescCompat
000000000000231b	callq	_shm_mq_detach_compat
00000000000024fd	callq	_CreateTemplateTupleDescCompat
0000000000002778	callq	_shm_mq_detach_compat
0000000000002a5b	callq	_shm_mq_detach_compat
0000000000002f74	callq	_shm_mq_send_compat
00000000000030a9	callq	_shm_mq_send_compat
0000000000003123	callq	_shm_mq_send_compat
0000000000003188	callq	_shm_mq_send_compat