test: re-enable test on riscv64 now that it supports external linking
test: re-enable test on riscv64 now that it supports external linking

Update #36739

Change-Id: I14ab2cd0e29966b9a2f992e8c3bcb415203e63e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/321449
Trust: Joel Sing <4816dabf8db1bc6cac35b3a24cab2ff844b5b0c7@sing.id.au>
Reviewed-by: Cherry Mui <d62e63aa42ce272d7b6a5055d97e942b33a34679@google.com>
Run-TryBot: Cherry Mui <d62e63aa42ce272d7b6a5055d97e942b33a34679@google.com>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

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