[compiler-rt] [tsan][RISCV] Add Go support for linux/riscv64 (PR #127295)

[Meng Zhuo via llvm-commits]

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@@ -373,6 +373,12 @@ void InitializePlatformEarly() {
     Printf("FATAL: Found %zd - Supported 39 and 48\n", vmaSize);
     Die();
   }
+#    else
+  if (vmaSize != 48) {
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mengzhuo wrote:

Go will use up to 1TiB VM for race detector (https://github.com/golang/go/blob/master/src/runtime/malloc.go#L521-L528)
which is way bigger than SV39 maximum vm size (256GiB)

https://github.com/llvm/llvm-project/pull/127295