[stdlib] fix prototype declaration in RuntimeShims.h #24054
Merged
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_swift_stdlib_getHardwareConcurrency's declaration isn't a proper prototype: it's missing
void
inside the brackets.Found while compiling the stdlib to WebAssembly, which fails with:
Functions with 'no-prototype' attribute must take varargs: _swift_stdlib_getHardwareConcurrency
This shouldn't impact existing platforms.