[openmp] Disable tests flaky on Debian

https://bugs.llvm.org/show_bug.cgi?id=45397

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>

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>

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>