similar commit from the past:
c73cd05468fba4bba5762a654aacdd9d90ecd272
This also modifies tools/update-linux-headers.zig to remove these same
files for next time to prevent a regression.
closes#10249
* Add missing Linux headers. Closes#9837
* Update existing headers to latest Linux.
* Consolidate headers that are the same for multiple Zig target CPU
architectures. For example, Linux has only an x86 directory for both
x86_64 and x86 CPU architectures. Now Zig only ships an x86 directory
for Linux headers, and will emit the proper corresponding -isystem
flags.
* tools/update-linux-headers.zig is now available for upgrading to
newer Linux headers, and the update process is now documented on the
wiki.