[Patch] Make testsuite consider avr as an ELF target

[Nick Clifton]

Hi Senthil,

> binutils/ChangeLog
> 2016-05-04  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
> 
> 	* testsuite/lib/binutils-common.exp (is_elf_format): Add avr-*-*.
> 
> ld/ChangeLog
> 2016-05-04  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
> 
> 	* testsuite/ld-elf/pr18735.d: Allow other symbols.
> 	* testsuite/ld-elf/sec64k.exp: Skip 64ksec for avr.
> 	* testsuite/ld-gc/pr14265.d: Allow other symbols.
> 	* testsuite/ld-plugin/plugin.exp: Add PR ld/17973 to
> 	plugin_tests only if check_shared_lib_support is true.
> 	* testsuite/ld-selective/selective.exp: Add --section-start
> 	flag for avr.
 
Approved and applied.

Cheers
  Nick