re PR go/82284 (go -version segfaults on big endian architectures)

	PR go/82284
	* elf.c (backtrace_initialize): Set pd.exe_filename.

From-SVN: r253078

libbacktrace/ChangeLog

+2017-09-21  Ian Lance Taylor  <iant@google.com>
+
+	PR go/82284
+	* elf.c (backtrace_initialize): Set pd.exe_filename.
+
 2017-09-20  Ian Lance Taylor  <iant@golang.org>
 	    Denis Khalikov  <d.khalikov@partner.samsung.com>
 

libbacktrace/elf.c

@@ -1489,6 +1489,7 @@ backtrace_initialize (struct backtrace_state *state, const char *filename,
   pd.fileline_fn = &elf_fileline_fn;
   pd.found_sym = &found_sym;
   pd.found_dwarf = &found_dwarf;
+  pd.exe_filename = filename;
   pd.exe_descriptor = ret < 0 ? descriptor : -1;
 
   dl_iterate_phdr (phdr_callback, (void *) &pd);