[bazel] Fix mpfr_wrapper build (#96341)

Author: keith

utils/bazel/llvm-project-overlay/libc/utils/MPFRWrapper/BUILD.bazel

@@ -39,10 +39,12 @@ libc_support_library(
     ),
     deps = [
         "//libc:__support_common",
+        "//libc:__support_cpp_array",
         "//libc:__support_cpp_bit",
         "//libc:__support_cpp_bitset",
         "//libc:__support_cpp_string",
         "//libc:__support_cpp_string_view",
+        "//libc:__support_cpp_stringstream",
         "//libc:__support_cpp_type_traits",
         "//libc:__support_fputil_fp_bits",
         "//libc:__support_fputil_fpbits_str",