posix/aio*: Added notification on request completion

The patch adds the generation of a notification after an Asynchronous I/O
request has been completed. The notification is generated using the aio_sigevent
filed in the aiocb struct, as defined by the posix specifiations.
A new control, ensuring the validity of the field, is added on each call to
aio_read(), aio_write() and aio_fsync().
The patch also adds tests to cover the new code, and fixes formatting errors of
various aio files.

spec/build/testsuites/psxtests/grp.yml

@@ -61,6 +61,8 @@ links:
   uid: psxaio02
 - role: build-dependency
   uid: psxaio03
+- role: build-dependency
+  uid: psxaio04
 - role: build-dependency
   uid: psxalarm01
 - role: build-dependency

spec/build/testsuites/psxtests/psxaio04.yml

@@ -0,0 +1,20 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+build-type: test-program
+cflags: []
+copyrights:
+- Copyright (C) 2024 Alessandro Nardin <ale.daluch@gmail.com>
+cppflags: []
+cxxflags: []
+enabled-by:
+- RTEMS_POSIX_API
+features: c cprogram
+includes: []
+ldflags: []
+links: []
+source:
+- testsuites/psxtests/psxaio04/init.c
+stlib: []
+target: testsuites/psxtests/psxaio04.exe
+type: build
+use-after: []
+use-before: []