bcc: remove trailing semicolon of macro

The trailing semicolon of a do-while style macro will cause
a if-else condition without braces failed to compile.
Meanwhile, also align with other do-while style macros.

src/cc/export/helpers.h

@@ -1347,20 +1347,20 @@ static int ____##name(unsigned long long *ctx, ##args)
  do { \
  unsigned short __offset = args->data_loc_##field & 0xFFFF; \
  bpf_probe_read((void *)dst, length, (char *)args + __offset); \
- } while (0);
+ } while (0)
 
 #define TP_DATA_LOC_READ(dst, field) \
  do { \
  unsigned short __offset = args->data_loc_##field & 0xFFFF; \
  unsigned short __length = args->data_loc_##field >> 16; \
  bpf_probe_read((void *)dst, __length, (char *)args + __offset); \
- } while (0);
+ } while (0)
 
 #define TP_DATA_LOC_READ_STR(dst, field, length) \
  do { \
  unsigned short __offset = args->data_loc_##field & 0xFFFF; \
  bpf_probe_read_str((void *)dst, length, (char *)args + __offset); \
- } while (0);
+ } while (0)
 
 #endif
 )********"