[Committed,AVR]: Fix SVN properties svn:executable

[Georg-Johann Lay]

Some files had wrong svn:executable property, I fixed that.

http://gcc.gnu.org/viewcvs?view=revision&revision=177039

Johann

        * config/avr/avr-devices.c: Delete SVN property svn:executable.
        * config/avr/predicates.md: Ditto.
        * config/avr/driver-avr.c: Ditto.
        * config/avr/genopt.sh: Set SVN property svn:executable to *.