- Move marcos for __attribute__ usage to my_attribute.h and
   include that file where needed


include/Makefile.am:
  Add new header file my_attribute.h
include/m_ctype.h:
  Include my_attribute.h in order to use ATTRIBUTE_* macros
include/my_global.h:
  Move the ATTRIBUTE_* macros to my_attribute.h 
  Include my_attribute.h
include/my_sys.h:
  No need to protect the inclusion of header file, it will
  protect itself
include/my_attribute.h:
  New BitKeeper file ``include/my_attribute.h''