1. rename semphone to semaphore
2. add comment for tsched.h
3. change the function signature for taosSchedulerTask, changing from
return int to void. We currently don't check any return code of the function.
4. add some error handlings. For fatal error, just exit the process because
the program may run into a random state.

* [TD-4872]<fix>: fix buffer overflow in -O3 build

* [TD-4872]<fix>: fix tasodemo buffer overflow with -O3

* [TD-4872]<fix>: fix tasodump buffer overflow with -O3

[TD-4243]<enhance>: block_dist percentile approximation to reduce memory usage especially for super table

[td-4329]update the error code,add a new error code TSDB_CODE_TSC_INVALID_OPERATION, instead of TSDB_CODE_TSC_INVALID_SQL.

* [TD-3913]<fix>: mips compile support.

* [TD-3913]<fix>: mips64 support.

* fix osSignal.c

* fix tcrc32c.c

* fix cmake.

* fix osInc.h

* fix gcc 4.8 compile error.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-3913]<fix>: mips compile support.

* [TD-3912]<fix>: support mips64 compile.

add mips64 header file and modify tcrc32c.c for mips64.

* [TD-3913]<fix>: mips compile support.

verified on real loongson machine.

* fix cmake.

* fix gcc 4.8 compile error.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>