Added basic detection for AIX linker (not really a better way)

mesonbuild/environment.py

@@ -930,6 +930,8 @@ This is probably wrong, it should always point to the native compiler.''' % evar
                 return ArLinker(linker)
             if p.returncode == 1 and err.startswith('usage'): # OSX
                 return ArLinker(linker)
+            if p.returncode == 1 and err.startswith('Usage'): # AIX
+                return ArLinker(linker)
         self._handle_exceptions(popen_exceptions, linkers, 'linker')
         raise EnvironmentException('Unknown static linker "%s"' % ' '.join(linkers))