Update os_aix.cpp

Restore comments.

src/hotspot/os/aix/os_aix.cpp

@@ -1144,6 +1144,8 @@ bool os::dll_address_to_library_name(address addr, char* buf,
   return AixSymbols::get_module_name(addr, buf, buflen);
 }
 
+// Loads .dll/.so and in case of error it checks if .dll/.so was built
+// for the same architecture as Hotspot is running on.
 static void* dll_load_library(const char *filename, char *ebuf, int ebuflen) {
 
   log_info(os)("attempting shared library load of %s", filename);