[llvm] [RISCV] Support .option {no}exact (PR #122483)

[Sam Elliott via llvm-commits]

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@@ -53,6 +53,8 @@ void RISCVTargetELFStreamer::emitDirectiveOptionPIC() {}
 void RISCVTargetELFStreamer::emitDirectiveOptionNoPIC() {}
 void RISCVTargetELFStreamer::emitDirectiveOptionRVC() {}
 void RISCVTargetELFStreamer::emitDirectiveOptionNoRVC() {}
+void RISCVTargetELFStreamer::emitDirectiveOptionExact() {}
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lenary wrote:

I went through and alphabetised all of these.

https://github.com/llvm/llvm-project/pull/122483