Hexagon: set ELF_EXEC_PAGESIZE to PAGE_SIZE

#define CORE_DUMP_USE_REGSET

/* Hrm is this going to cause problems for changing PAGE_SIZE?  */

#define ELF_EXEC_PAGESIZE	4096

#define ELF_EXEC_PAGESIZE	PAGE_SIZE

/*

 * This is the location that an ET_DYN program is loaded if exec'ed.  Typical