Provide single precision hyperbolic math routines by AOF in Stubs
Supply the single precision hyperbolic math routines (coshf/sinhf/tanhf) - which are not exported by the SharedCLibrary - as a separate object file in C:o.Stubs, akin to mathl for long double precision functions. Existing programs linking with C:o.Stubs won't pick anything extra up.
Note that these functions are already correctly exported by C:o.AnsiLib, so have not been added there.
Builds OK on my system and exports them correctly.
This does not affect the SharedCLibrary or ROM, just the Stubs file.