Created by: percontation
These changes seem sufficient to allow building dynamorio on an alpine linux container, and to successfully run some basic clients. No further testing was done.
Addresses #1973 , sort of. I don't believe musl libc distros expose struct _IO_FILE fields at all, so I opted to just disable the related feature. (FWIW, copying in some specific version of musl's struct _IO_FILE would "work".)