Merge commit '8e0febe28effe7f427e45190eab37110126161ea'

* commit '8e0febe28effe7f427e45190eab37110126161ea':
  configure: Use right variable and right value for AIX ar flags

Merged-by: James Almer <jamrial@gmail.com>

configure

@@ -4873,7 +4873,7 @@ case $target_os in
         SHFLAGS=-shared
         add_cppflags '-I\$(SRC_PATH)/compat/aix'
         enabled shared && add_ldflags -Wl,-brtl
-        ar_default='ar -Xany'
+        arflags='-Xany -r -c'
         ;;
     android)
         disable symver