added RTTI support for Aix

[SVN r10531]

status/compiler.cfg

@@ -12,7 +12,7 @@
 aix
 xlC
 Visual Age v5.0
-xlC -c -I%include %source
+xlC -c -qrtti -I%include %source
 xlC -o boosttmp.exe -I%include %source
 Visual Age<br> v5.0