[LLVM][Support] Allow `char[N]` parameters in `llvm::format` (#159541)

Cygwin builds are currently broken after #157312, which effectively
reverted #138117. The root cause is that Cygwin defines
`DL_info::dli_fname` as `char[N]`, which is not a valid parameter type
for `llvm::format`.

This patch allows `llvm::format` to accept `char[N]` by decaying it to
`const char *`. As a result, string literals are also accepted without
an explicit cast.

Other array types remain rejected:
- Wide/unicode character arrays (e.g., `wchar_t[N]`) are not supported,
as LLVM does not use them and they are less compatible with platform's
`printf` implementations.
- Non-character arrays (e.g., `int[N]`) are also rejected, since passing
such arrays to `printf` is meaningless.

0 files changed, 0 insertions, 0 deletions