[binutils-gdb] [nto] Implement procfs_pid_to_exec_file.

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT e5343fde2046fbc19b9ac91326d5829d40066872 ***

Author: Aleksandar Ristovski <aristovski@qnx.com>
Branch: master
Commit: e5343fde2046fbc19b9ac91326d5829d40066872

[nto] Implement procfs_pid_to_exec_file.

gdb/ChangeLog:

	* gdb/nto-procfs.c (procfs_pid_to_exec_file): New function.
	(init_procfs_targets): Wire new function.