[libc++] Mark iostreams test as XFAIL on older macOSes

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@372620 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/input.output/iostreams.base/ios.base/ios.types/ios_Init/ios_Init.multiple.pass.cpp

@@ -14,6 +14,18 @@
 // Test to make sure that the streams only get initialized once
 // Taken from https://bugs.llvm.org/show_bug.cgi?id=43300
 
+// The dylibs shipped on macOS so far do not contain the fix for PR43300, so
+// this test fails.
+// XFAIL: with_system_cxx_lib=macosx10.15
+// XFAIL: with_system_cxx_lib=macosx10.14
+// XFAIL: with_system_cxx_lib=macosx10.13
+// XFAIL: with_system_cxx_lib=macosx10.12
+// XFAIL: with_system_cxx_lib=macosx10.11
+// XFAIL: with_system_cxx_lib=macosx10.10
+// XFAIL: with_system_cxx_lib=macosx10.9
+// XFAIL: with_system_cxx_lib=macosx10.8
+// XFAIL: with_system_cxx_lib=macosx10.7
+
 int main(int, char**)
 {