v1.0-rc2

Besides some new tests, script updates and maintenance, this release fixes the following three errata from the previous release:

• Unpredictable behaviour when Zcmp cm.popret is interrupted during the PC-setting uop step: fixed by 2f6e983
• SBA accesses fail to make progress when the processor clock is gated during sleep: fixed by c11581e
• New SBA reads can still be initiated whilst sbcs.sberror or sbcs.sbbusyerror are set, causing spurious downstream reads and address increments: fixed by af08c0b

This release candidate has the following known errata:

• PMPCFG fields R and X are transposed: fixed by 7d37029
• mstatus.mie is not ignored in U-mode: fixed by a84742a