[clang] [Cygwin] Reduced number of inline elements of CallArgList. (PR #74977)

[Yingchi Long via cfe-commits]

https://github.com/inclyc commented:

> This fix bootstraping on Cygwin, using GCC 13.2.0 as stage 0 compiler.
It seems that the size of CallArgList can't exceed an unknown limit.

How about paste some logs here? This change seems to be completely NFC, and I suppose it shall work for GCC 13?

https://github.com/llvm/llvm-project/pull/74977