[POSIX] Add perror from musl to Chrobalt #6052
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Add the perror symbol from musl to our Chrobalt build.
Currently, we do not support the existing implementation of
perror.
After some discussion offline, we decided that it would be best to still introduce the symbol into Chrobalt with aCOBALT_HERMETIC_HACK
which provides a temporary implementation that we currently support.Once the implementation for the iobuffer has been introduced, we can update perror's implementation to a more proper solution.
Bug: 420683722