* genattr.c: Wrap prototype of `free' in NEED_DECLARATION_FREE.
        * genattrtab.c: Likewise.
        * genconfig.c: Likewise.
        * genemit.c: Likewise.
        * genextract.c: Likewise.
        * genflags.c: Likewise.
        * genopinit.c: Likewise.
        * genoutput.c: Likewise.
        * genpeep.c: Likewise.
        * genrecog.c: Likewise.
        * tlink.c: Likewise.  Also wrap `getenv' in NEED_DECLARATION_GETENV.

From-SVN: r18284