7127  remove -Wno-missing-braces from Makefile.uts

*** 1477,1487 ****
  
  int
  zvol_getefi(void *arg, int flag, uint64_t vs, uint8_t bs)
  {
          struct uuid uuid = EFI_RESERVED;
!         efi_gpe_t gpe = { 0 };
          uint32_t crc;
          dk_efi_t efi;
          int length;
          char *ptr;
  
--- 1477,1487 ----
  
  int
  zvol_getefi(void *arg, int flag, uint64_t vs, uint8_t bs)
  {
          struct uuid uuid = EFI_RESERVED;
!         efi_gpe_t gpe = { {0} };
          uint32_t crc;
          dk_efi_t efi;
          int length;
          char *ptr;