open_posix: modified ltp,rwlock need init

[extinguish]

open_posix: the rwlock need to init, to add init procedure to the rwlock before use

Signed-off-by: anjiahao [email protected]

[metan-ucw]

Again the description should be rewritten, among other things it has to explain why the change is needed.

[extinguish]

@metan-ucw please help to check if the descibe info meet requirements, if not, I will modify them immediately. thank you

[metan-ucw]

Looking at the test closely the point of the test is to figure out what happens when we attempt to lock an uninitialized lock and the end result is not well defined, hence it's in the speculative directory. What exactly does happen on NuttX when this test is executed?