ld: implement -ztype and rework option parsing

*** 159,168 ****
--- 159,169 ----
                                                  /*      that produced object */
  #define DT_SUNW_CAPCHAINENT     0x6000001d      /* capabilities chain entry */
  #define DT_SUNW_CAPCHAINSZ      0x6000001f      /* capabilities chain size */
  /* 0x60000021 would be DT_SUNW_PARENT */
  #define DT_SUNW_ASLR            0x60000023      /* executable ASLR desire */
+ #define DT_SUNW_KMOD            0x60000027      /* object is a kernel module */
  
  /*
   * DT_* encoding rules do not apply between DT_HIOS and DT_LOPROC
   */
  #define DT_HIOS                 0x6ffff000