[SYCL] Fix error ‘CHAR_BIT’ was not declared in this scope in sycl/source/stream.cpp

[jchlanda]

Fix:
error: ‘CHAR_BIT’ was not declared in this scope

[jchlanda]

Looks like CI is experiencing some problems: https://github.com/intel/llvm/actions/runs/5794615743/job/15704584428?pr=10726#step:10:49

[jchlanda]

Windows runner seems to be in a broken state:

cmake : The term 'cmake' is not recognized as the name of a cmdlet, function, script file, or operable program. Check 
the spelling of the name, or if a path was included, verify that the path is correct and try again.
At D:\github\actions-runner\_work\_temp\0f2dcde1-b197-424a-a3f7-ea6d5d45a736.ps1:2 char:1
+ cmake --build build --target check-sycl
+ ~~~~~
    + CategoryInfo          : ObjectNotFound: (cmake:String) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : CommandNotFoundException

[KornevNikita]

@aelovikov-intel there is some issue with configuring the job
#10729

[aelovikov-intel]

@aelovikov-intel there is some issue with configuring the job

This is a problem with a temporary runner that was set up for the shutdown of regular ones over the weekend.

[jchlanda]

The failures are not related (amdgpu) or CI glitches (gen12), @intel/llvm-gatekeepers