Archive shared library in AIX (#11850)

* Archive shared library in AIX

This code change to ensure we archive shared libraries in AIX.

The things we do are:
Archive shared library
Install archived shared library
Build all must build the archived shared library
blibpath must have the archived shared library dependency.

* Archive shared library in AIX.

Made changes as per the review comments given in the first
PR request.

They are:-
Use self.environment.machines[t.for_machine].is_aix()
Remove trial spaces
Use of val instead of internal
Changed comments wherever requested

* Space after octothorpe

* Fixed failed test case causing build break during install section

* Moved AIX specific code to AIXDynamicLinker from backend

* Fix indentation, trailing spaces, add type annotations and Linux/macOS build break

* Remove some more trailing space issues

* Fixed the wrong return type in linkers

1 files changed, 6 insertions, 0 deletions

diff --git a/mesonbuild/envconfig.py b/mesonbuild/envconfig.py
index 1bf6ab9..24c1855 100644
--- a/mesonbuild/envconfig.py
+++ b/mesonbuild/envconfig.py
@@ -357,6 +357,12 @@ class MachineInfo(HoldableObject):
         """
         return self.system == 'gnu'
 
+    def is_aix(self) -> bool:
+        """
+        Machine is aix?
+        """
+        return self.system == 'aix'
+
     def is_irix(self) -> bool:
         """Machine is IRIX?"""
         return self.system.startswith('irix')