[Bug target/65296] [avr] fix various issues with specs file generation

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65296

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2015-03-03
           Assignee|unassigned at gcc dot gnu.org      |gjl at gcc dot gnu.org
     Ever confirmed|0                           |1