aarch64-pe fails of tls-debug tests

These fail to assemble since they use ELF section directives.  There
isn't any need to test for an aarch64 target since that is done in
aarch64.exp.

	* testsuite/gas/aarch64/tls-debug.d: Replace aarch64 target test
	with is_elf_format.
	* testsuite/gas/aarch64/tls-debug-bad.d: Likewise.

diff --git a/gas/testsuite/gas/aarch64/tls-debug-bad.d b/gas/testsuite/gas/aarch64/tls-debug-bad.d
index fb1af537d95..8491551039c 100644
--- a/gas/testsuite/gas/aarch64/tls-debug-bad.d
+++ b/gas/testsuite/gas/aarch64/tls-debug-bad.d
@@ -1,4 +1,4 @@
 #as:
 #objdump: -r
-#target: aarch64*-*-*
+#target: [is_elf_format]
 #error_output: tls-debug-bad.l
diff --git a/gas/testsuite/gas/aarch64/tls-debug.d b/gas/testsuite/gas/aarch64/tls-debug.d
index 1dd4df17542..aac39234ab6 100644
--- a/gas/testsuite/gas/aarch64/tls-debug.d
+++ b/gas/testsuite/gas/aarch64/tls-debug.d
@@ -1,6 +1,6 @@
 #as:
 #objdump: -r
-#target: aarch64*-*-*
+#target: [is_elf_format]
 
 #...
 RELOCATION RECORDS FOR \[\.debug_info\]:

-- 
Alan Modra