[clang] [compiler-rt] [profile] Add `%b` `LLVM_PROFILE_FILE` option for binary ID (PR #123963)

[David Li via llvm-commits]

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@@ -2917,7 +2918,7 @@ instrumentation:
      $ LLVM_PROFILE_FILE="code-%m.profraw" ./code
 
    See `this <SourceBasedCodeCoverage.html#running-the-instrumented-program>`_ section
-   about the ``%t``, and ``%c`` modifiers.
+   about the ``%b``, ``%t``, and ``%c`` modifiers.
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david-xl wrote:

better add an %b use example here  too.

https://github.com/llvm/llvm-project/pull/123963