Add rv64si-p-dirty to list of tests.
Add rv64si-p-dirty to list of tests.

Also, sort the list of tests by name.
We now pass all rv64mi-, rv64si-, and rv64ui-p- tests. Only the virtual memory
tests (rv64ui-v-) remain.

mit-plv/riscv-semantics,mit-plv/riscv-semantics,mit-plv/riscv-semantics,mit-plv/riscv-semantics,mit-plv/riscv-semantics