re PR target/57589 (Linux powerpc -mcpu=native returns pointer to variable on stack in driver-rs6000.c)

2013-06-11  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/57589
	* config/rs6000/driver-rs6000.c (elf_platform): Make buffer static
	to allow returning address to AT_PLATFORM name.

From-SVN: r199972