Typedef for __kernel_sa_family_t in _fake_typedefs.h (#578)

This typedef that exists in the real `linux/socket.h` is masked by the
`fake_libc_include` hierarchy. Having it in place allows to successfully
parse a large number of Linux kernel headers necessary for netlink
operations. This is very useful for Python projects that communicate
with the kernel over netlink socket. In particular, this project:

https://github.com/ionos-cloud/netlinklib/tree/main/netlinklib

plans to use pyparser for parsing strcts defined in the kernel headers.

Signed-off-by: Eugene Crosser <[email protected]>
Co-authored-by: Eugene Crosser <[email protected]>

Author: crosser

utils/fake_libc_include/_fake_typedefs.h

@@ -183,6 +183,7 @@ typedef void* DIR;
 /* socket typedefs */
 typedef	__uint32_t  __socklen_t;
 typedef __socklen_t socklen_t;
+typedef unsigned short __kernel_sa_family_t;
 
 /* C11 stdatomic.h types */
 typedef _Atomic(_Bool)              atomic_bool;