Enable string-length wide-reads by default in bazel. (llvm#159177)

Author: Sterling-Augustine

utils/bazel/llvm-project-overlay/libc/libc_configure_options.bzl

@@ -39,7 +39,7 @@ LIBC_CONFIGURE_OPTIONS = [
     # "LIBC_COPT_SCANF_DISABLE_FLOAT",
     # "LIBC_COPT_SCANF_DISABLE_INDEX_MODE",
     "LIBC_COPT_STDIO_USE_SYSTEM_FILE",
-    # "LIBC_COPT_STRING_UNSAFE_WIDE_READ",
+    "LIBC_COPT_STRING_UNSAFE_WIDE_READ",
     # "LIBC_COPT_STRTOFLOAT_DISABLE_CLINGER_FAST_PATH",
     # "LIBC_COPT_STRTOFLOAT_DISABLE_EISEL_LEMIRE",
     # "LIBC_COPT_STRTOFLOAT_DISABLE_SIMPLE_DECIMAL_CONVERSION",