Eliminate .so PLT entries for local symbols. (thanks to Arjan van de Ven)

Eliminate .so PLT entries for local symbols. (thanks to Arjan van de Ven)

Using a simple shell script that processes the public headers, two header
files are constructed that map public symbols to hidden internal aliases
avoiding the assocated PLT entry for referring to a public symbol.

A few mistakes in the FcPrivate/FcPublic annotations were also discovered
through this process