re #13388 rb4382 fmd_api.h uses bool which is a C99/C++ keyword

*** 545,555 ****
          }
  
          switch (s.fmds_type) {
          case FMD_TYPE_BOOL:
                  mdb_printf("%-11p %-4s %-32s %s\n", addr, "bool",
!                     s.fmds_name, s.fmds_value.bool ? "true" : "false");
                  break;
          case FMD_TYPE_INT32:
                  mdb_printf("%-11p %-4s %-32s %d\n", addr, "i32",
                      s.fmds_name, s.fmds_value.i32);
                  break;
--- 545,555 ----
          }
  
          switch (s.fmds_type) {
          case FMD_TYPE_BOOL:
                  mdb_printf("%-11p %-4s %-32s %s\n", addr, "bool",
!                     s.fmds_name, s.fmds_value.b ? "true" : "false");
                  break;
          case FMD_TYPE_INT32:
                  mdb_printf("%-11p %-4s %-32s %d\n", addr, "i32",
                      s.fmds_name, s.fmds_value.i32);
                  break;