Put AT_CLKTCK in ELF auxiliary vectors

Put AT_CLKTCK in ELF auxiliary vectors because some functions
use the value as described below.
1. GLRO(dl_clktck) set by
   _dl_aux_init (in glibc/elf/dl-support.c)
   or
   _dl_sysdep_start (in elf/dl-sysdep.c)

2. GLRO(dl_clktck) is referenced by
__sysconf (in glibc/sysdeps/posix/sysconf.c)
   __getclktck
      (in glibc/sysdeps/unix/sysv/linux/getclktck.c)
profil (in glibc/sysdeps/posix/profil.c)
   __profile_frequency
      (in glibc/sysdeps/unix/sysv/linux/prof-freq.c)

executer/include/uprotocol.h

@@ -79,6 +79,7 @@ struct program_load_desc {
 	unsigned long at_phent;
 	unsigned long at_phnum;
 	unsigned long at_entry;
+	unsigned long at_clktck;
 	char *args;
 	unsigned long args_len;
 	char *envs;

executer/user/mcexec.c

@@ -221,6 +221,7 @@ struct program_load_desc *load_elf(FILE *fp, char **interp_pathp)
 	desc->at_phent = sizeof(phdr);
 	desc->at_phnum = hdr.e_phnum;
 	desc->at_entry = hdr.e_entry;
+	desc->at_clktck = sysconf(_SC_CLK_TCK);
 
 	return desc;
 }

kernel/include/syscall.h

@@ -119,6 +119,7 @@ struct program_load_desc {
 	unsigned long at_phent;
 	unsigned long at_phnum;
 	unsigned long at_entry;
+	unsigned long at_clktck;
 	char *args;
 	unsigned long args_len;
 	char *envs;

kernel/process.c

@@ -1396,6 +1396,8 @@ int init_process_stack(struct process *process, struct program_load_desc *pn,
 	p[s_ind--] = AT_PHDR;	
 	p[s_ind--] = 4096; /* AT_PAGESZ */
 	p[s_ind--] = AT_PAGESZ;
+	p[s_ind--] = pn->at_clktck; /* AT_CLKTCK */
+	p[s_ind--] = AT_CLKTCK;
 	p[s_ind--] = 0;     /* envp terminating NULL */
 	/* envp */
 	for (arg_ind = envc - 1; arg_ind > -1; --arg_ind) {