[llvm] [libc][bazel] Added wchar functions to bazel (PR #146126)

[Michael Jones via llvm-commits]

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@@ -5676,3 +5728,286 @@ libc_function(
         ":types_struct_timespec",
     ],
 )
+
+############################## wchar targets ###############################
+
+libc_support_library(
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michaelrj-google wrote:

this should go with the other files in `__support`

https://github.com/llvm/llvm-project/pull/146126