Add IBM Visual Age compiler, from Toon Knapen

[SVN r9612]

status/compiler.cfg

@@ -8,6 +8,13 @@
 //               for vc6 builds. Added cygwin build. Waiting for a fix for
 //               cygwin/stlport to add that (David Abrahams).
 
+aix
+xlC
+Visual Age v5.0
+xlC -c -I%include %source
+xlC -o boosttmp.exe -I%include %source
+Visual Age<br> v5.0
+
 linux
 gcc
 GCC 2.95.2

status/regression.cpp

@@ -50,6 +50,8 @@ std::string get_host()
   return "beos";
 #elif defined __hpux
   return "hpux";
+#elif defined __IBMCPP__
+  return "aix";
 #else
 # error Please adapt for your platform
 #endif