From https://ci.linaro.org/job/tcwg_gcc_check_bootstrap-bisect-master-arm-check_bootstrap_lto/13/

Change-Id: I2d58168d4d29640f526f1780f502776e864122e1
diff --git a/contrib/testsuite-management/flaky/tcwg_gcc_check_bootstrap-master-arm-check_bootstrap_lto.xfail b/contrib/testsuite-management/flaky/tcwg_gcc_check_bootstrap-master-arm-check_bootstrap_lto.xfail
index b82c4e6..d085798 100644
--- a/contrib/testsuite-management/flaky/tcwg_gcc_check_bootstrap-master-arm-check_bootstrap_lto.xfail
+++ b/contrib/testsuite-management/flaky/tcwg_gcc_check_bootstrap-master-arm-check_bootstrap_lto.xfail
@@ -43762,3 +43762,12 @@
 flaky | FAIL: gfortran.dg/gomp/workshare1.f90 -O  (test for excess errors)
 
 		=== Results Summary ===
+
+# From https://ci.linaro.org/job/tcwg_gcc_check_bootstrap-bisect-master-arm-check_bootstrap_lto/13/:
+		=== g++ tests ===
+
+Running g++.dg/dg.exp ...
+flaky | FAIL: c-c++-common/missing-header-4.c -std=gnu++17  expected multiline pattern lines 5-7 not found: "\s*#import "this-file-does-not-exist\.h".*\n         \^~~~~~~~~~~~~~~~~~~~~~~~~~~~\ncompilation terminated\..*\n"
+flaky | FAIL: c-c++-common/missing-header-4.c -std=gnu++17 (test for excess errors)
+
+		=== Results Summary ===