[Bug c/48110] "fast" and "g" should be aliases of "Ofast" and "Og" inside optimize attribute

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48110
Bug 48110 depends on bug 53776, which changed state.

Bug 53776 Summary: pragma optimize does not support Os
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53776

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED