[MC] Move AllowTemporaryLabels setting to MCContext::MCContext
Also delete `AllowTemporaryLabels = true` from MCContext::reset: when llc supports -save-temp-labels in the next change, this assignment should be removed to support -compile-twice.
Also delete `AllowTemporaryLabels = true` from MCContext::reset: when llc supports -save-temp-labels in the next change, this assignment should be removed to support -compile-twice.
mentioned in commit a91c8398
·mentioned in commit a91c8398