Roll libc++ to 22d3f6dd

Change necessary to fix Windows build:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+/417a7dee1c4653bd3a4753710a84c8fd356ba7d9

Change necessary to fix _LIBCPP_DEBUG=1 build:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+/9ae8fb4a3c5fef4e9d41e97bbd9397a412932ab0

Full changelist:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+log/22d3f6dd25e5efc59124ba1c00b8f98b14be4201..9ae8fb4a3c5fef4e9d41e97bbd9397a412932ab0

BUG=801780,923166
R=thakis

Change-Id: Ib4d81c9a756d84fb2e7b0d5912c3cea493728608
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1506566
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638345}

DEPS

@@ -272,7 +272,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libc++
   # and whatever else without interference from each other.
-  "libcxx_revision": "22d3f6dd25e5efc59124ba1c00b8f98b14be4201",
+  "libcxx_revision": "9ae8fb4a3c5fef4e9d41e97bbd9397a412932ab0",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libc++abi
   # and whatever else without interference from each other.

buildtools/DEPS

@@ -5,7 +5,7 @@ vars = {
 
   # When changing these, also update the svn revisions in deps_revisions.gni
   "clang_format_revision": "96636aa0e9f047f17447f2d45a094d0b59ed7917",
-  "libcxx_revision":       "22d3f6dd25e5efc59124ba1c00b8f98b14be4201",
+  "libcxx_revision":       "9ae8fb4a3c5fef4e9d41e97bbd9397a412932ab0",
   "libcxxabi_revision":    "0d529660e32d77d9111912d73f2c74fc5fa2a858",
   "libunwind_revision":    "69d9b84cca8354117b9fe9705a4430d789ee599b",
 }

buildtools/deps_revisions.gni

@@ -6,7 +6,7 @@ declare_args() {
   # The svn revisions that belong to the git hashes in DEPS. Used to cause full
   # rebuilds on libc++ rolls.
   clang_format_svn_revision = "346566"
-  libcxx_svn_revision = "354212"
+  libcxx_svn_revision = "355550"
   libcxxabi_svn_revision = "354284"
   libunwind_svn_revision = "348981"
 }