[openmp] Disable tests flaky on Debian

https://bugs.llvm.org/show_bug.cgi?id=45397
diff --git a/openmp/runtime/test/tasking/bug_nested_proxy_task.c b/openmp/runtime/test/tasking/bug_nested_proxy_task.c
index f70e904..b4e8a54 100644
--- a/openmp/runtime/test/tasking/bug_nested_proxy_task.c
+++ b/openmp/runtime/test/tasking/bug_nested_proxy_task.c
@@ -2,6 +2,10 @@
 // The runtime currently does not get dependency information from GCC.
 // UNSUPPORTED: gcc
 
+// Very flaky on openmp-clang-x86_64-linux-debian.
+// https://bugs.llvm.org/show_bug.cgi?id=45397
+// UNSUPPORTED: linux
+
 #include <stdio.h>
 #include <omp.h>
 #include <pthread.h>
diff --git a/openmp/runtime/test/tasking/bug_proxy_task_dep_waiting.c b/openmp/runtime/test/tasking/bug_proxy_task_dep_waiting.c
index c07f399..d48314b 100644
--- a/openmp/runtime/test/tasking/bug_proxy_task_dep_waiting.c
+++ b/openmp/runtime/test/tasking/bug_proxy_task_dep_waiting.c
@@ -2,6 +2,10 @@
 // The runtime currently does not get dependency information from GCC.
 // UNSUPPORTED: gcc
 
+// Very flaky on openmp-clang-x86_64-linux-debian.
+// https://bugs.llvm.org/show_bug.cgi?id=45397
+// UNSUPPORTED: linux
+
 #include <stdio.h>
 #include <omp.h>
 #include <pthread.h>
diff --git a/openmp/runtime/test/tasking/omp_task_depend_resize_hashmap.c b/openmp/runtime/test/tasking/omp_task_depend_resize_hashmap.c
index 971f8c0..58cca56 100644
--- a/openmp/runtime/test/tasking/omp_task_depend_resize_hashmap.c
+++ b/openmp/runtime/test/tasking/omp_task_depend_resize_hashmap.c
@@ -3,6 +3,11 @@
 // This test is known to be fragile on NetBSD kernel at the moment,
 // https://bugs.llvm.org/show_bug.cgi?id=42020.
 // UNSUPPORTED: netbsd
+
+// Very flaky on openmp-clang-x86_64-linux-debian.
+// https://bugs.llvm.org/show_bug.cgi?id=45397
+// UNSUPPORTED: linux
+
 #include<omp.h>
 #include<stdlib.h>
 #include<string.h>