[gn] port d332d88 (tzdb.cpp)

Author: nico

llvm/utils/gn/secondary/libcxx/include/BUILD.gn

@@ -369,6 +369,8 @@ if (current_toolchain == default_toolchain) {
       "__chrono/steady_clock.h",
       "__chrono/system_clock.h",
       "__chrono/time_point.h",
+      "__chrono/time_zone.h",
+      "__chrono/time_zone_link.h",
       "__chrono/tzdb.h",
       "__chrono/tzdb_list.h",
       "__chrono/weekday.h",

llvm/utils/gn/secondary/libcxx/src/BUILD.gn

@@ -315,7 +315,13 @@ if (libcxx_enable_experimental) {
     sources = [ "experimental/keep.cpp" ]
     if (libcxx_enable_filesystem && libcxx_enable_time_zone_database) {
       sources += [
-        "tz.cpp",
+        "include/tzdb/time_zone_link_private.h",
+        "include/tzdb/time_zone_private.h",
+        "include/tzdb/types_private.h",
+        "include/tzdb/tzdb_list_private.h",
+        "include/tzdb/tzdb_private.h",
+        "time_zone.cpp",
+        "tzdb.cpp",
         "tzdb_list.cpp",
       ]
     }