Attempt to fix stdint/cstdint modules try 2

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@287690 91177308-0d34-0410-b5e6-96231b3b80d8

include/module.modulemap

@@ -45,7 +45,13 @@ module std [system] {
       // <stddef.h>'s __need_* macros require textual inclusion.
       textual header "stddef.h"
     }
-    // FIXME: <stdint.h> is missing.
+    module stdint_h {
+      header "stdint.h"
+      export *
+      // FIXME: This module only exists on OS X and for some reason the
+      // wildcard above doesn't export it.
+      export Darwin.C.stdint
+    }
     module stdio_h {
       // <stdio.h>'s __need_* macros require textual inclusion.
       textual header "stdio.h"
@@ -158,6 +164,7 @@ module std [system] {
     }
     module cstdint {
       header "cstdint"
+      export depr.stdint_h
       export *
     }
     module cstdio {