Signed-off-by: Yuki Okushi <[email protected]>

Move `AT_*` consts from `linux_like/linux/gnu` to `linux_like/linux`

They are available on musl and uclibc as well.
Fixes #2121

Define SO_INCOMING_CPU for i686-unknown-linux-gnu

Hi! Following the example from #2119, I've tried adding the constant to i686-unknown-linux-gnu as well to fix a similar issue.

Define SO_INCOMING_CPU for i686-unknown-linux-musl

Following the examples from #2119 and #2123, to fix the same issue with `socket2`: rust-lang/socket2#213

It was added in FreeBSD 11.1.

Add MAP_GUARD on FreeBSD.

It was added in FreeBSD 11.1.

 * processor_cpu_load_info
 * processor_cpu_load_info_t
 * processor_cpu_load_info_data_t
 * processor_basic_info
 * processor_basic_info_t
 * processor_basic_info_data_t
 * processor_set_basic_info
 * processor_set_basic_info_t
 * processor_set_basic_info_data_t
 * processor_set_load_info
 * processor_set_load_info_t
 * processor_set_load_info_data_t
 * natural_t
 * mach_msg_type_number_t
 * PROCESSOR_BASIC_INFO
 * PROCESSOR_CPU_LOAD_INFO
 * PROCESSOR_PM_REGS_INFO
 * PROCESSOR_TEMPERATURE
 * PROCESSOR_SET_BASIC_INFO
 * PROCESSOR_SET_LOAD_INFO

…itor

Add processor_cpu_load_info struct and processor_cpu_load_info_t alias

 * processor_flavor_t
 * processor_info_t
 * processor_info_array_t

Add more apple types

Forgot a few.

If it could be merged before #2128, it'd be awesome! Thanks in advance. :)

Make `pwrite64` available on uclibc

Fixes #2130

Constify `CMSG_SPACE` for all the targets

`CMSG_SPACE` is a const fn for Linux but it isn't for other targets. This constifies it on all the targets for consistency.

Fixes #2087

Bump crate version to 0.2.92

Could it be possible to have a new release in the coming days please? Thanks in advance!