[committed][gdb/testsuite] Fix label reference in implptr-64bit.exp

[Tom de Vries <tdevries@suse.de>]

Hi,

When running gdb.dwarf2/implptr-64bit.exp with board cc-with-dwz-m, we run into:
...
dwz: dwz.c:2363: checksum_die: \
  Assertion `\
    ((!op_multifile && !rd_multifile && !fi_multifile) || cu != die_cu (ref)) \
    && (!op_multifile || cu->cu_chunk == die_cu (ref)->cu_chunk)' failed.
cc-with-tweaks.sh: line 218: 13030 Aborted  \
  $DWZ -m ${output_file}.dwz "$output_file" ${output_file}.alt > /dev/null
...
In other words, PR dwz/24170.

The trigger for the dwz PR is when intra-CU references are encoded using
section-relative encoding DW_FORM_ref_addr, but could have been encoded using
CU-relative encoding DW_FORM_ref4.

Fix the intra-CU '%' label reference in implptr-64bit.exp.

Tested on x86_64-linux.

Committed to trunk.

Thanks,
- Tom

[gdb/testsuite] Fix label reference in implptr-64bit.exp

gdb/testsuite/ChangeLog:

2019-06-24  Tom de Vries  <tdevries@suse.de>

	* gdb.dwarf2/implptr-64bit.exp: Fix intra-CU '%' label reference.

---
 gdb/testsuite/gdb.dwarf2/implptr-64bit.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.dwarf2/implptr-64bit.exp b/gdb/testsuite/gdb.dwarf2/implptr-64bit.exp
index b023ca0f12..3e675016d0 100644
--- a/gdb/testsuite/gdb.dwarf2/implptr-64bit.exp
+++ b/gdb/testsuite/gdb.dwarf2/implptr-64bit.exp
@@ -84,7 +84,7 @@ proc test { dwarf_version offset_size addr_size ref_addr_size two_cu } {
 			{ name main }
 			{ low_pc main addr }
 			{ high_pc "main+0x100" addr }
-			{ type %$int_label }
+			{ type :$int_label }
 			{ external 1 flag }
 		    } {
 			DW_TAG_variable {