Mod_wsgi compilation error in AIX

Closes #913

Author: reshmavk

src/server/wsgi_memory.c

@@ -21,7 +21,11 @@
 
 #elif (defined(_AIX) || defined(__TOS__AIX__)) || (defined(__sun__) || defined(__sun) || defined(sun) && (defined(__SVR4) || defined(__svr4__)))
 #include <fcntl.h>
-#include <procfs.h>
+  #if defined(_AIX)
+  #include <sys/procfs.h>
+  #else
+  #include <procfs.h>
+  #endif
 
 #elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
 #include <stdio.h>