Update libc++ to 5726e559 (14 Jan 2022).

Notable changes:
* chrono modularization

ref:42040cfb4887a3eaac1dd7bc783623c820734637

1 files changed, 10 insertions, 0 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/module.modulemap b/contrib/libs/cxxsupp/libcxx/include/module.modulemap
index e7f197ec83f..33e0ecf6997 100644
--- a/contrib/libs/cxxsupp/libcxx/include/module.modulemap
+++ b/contrib/libs/cxxsupp/libcxx/include/module.modulemap
@@ -364,6 +364,16 @@ module std [system] {
   module chrono {
     header "chrono"
     export *
+
+    module __chrono {
+      module calendar              { private header "__chrono/calendar.h" }
+      module duration              { private header "__chrono/duration.h" }
+      module file_clock            { private header "__chrono/file_clock.h" }
+      module high_resolution_clock { private header "__chrono/high_resolution_clock.h" }
+      module steady_clock          { private header "__chrono/steady_clock.h" }
+      module system_clock          { private header "__chrono/system_clock.h" }
+      module time_point            { private header "__chrono/time_point.h" }
+    }
   }
   module codecvt {
     header "codecvt"