Bug fix: fix SQL flavour for upgrade.
Bug fix: fix SQL flavour for upgrade.

CraigsCoin/abe-craigscoin,ultracoindev/ultracoin-abe,muchbeli/bitcoin-abe,cryptapus/bitcoin-abe,muchbeli/bitcoin-abe,gjhiggins/altcoin-abe,gjhiggins/abe-bee2,mmitech/bitcoin-abe,jeromewu/bitcoin-abe-opennet,Dilmacoin/dilmacoin-abe,gjhiggins/abe-bee2,Max-Coin/maxcoin-abe,gjhiggins/chaincoin-abe,jonnynewbs/bitcoin-abe,jeromewu/bitcoin-abe-opennet,ultracoindev/ultracoin-abe,Dilmacoin/dilmacoin-abe,Serya05/bitcoin-abe,UdjinM6/darkcoin-abe,CraigsCoin/abe-craigscoin,ultracoindev/ultracoin-abe,mmitech/bitcoin-abe,jeorgen/bitcoin-abe,ultracoindev/ultracoin-abe,jonnynewbs/bitcoin-abe,gjhiggins/altcoin-abe,ultracoindev/ultracoin-abe,muchbeli/bitcoin-abe,gjhiggins/abe-bee2,muchbeli/bitcoin-abe,cryptapus/bitcoin-abe,gjhiggins/chaincoin-abe,UdjinM6/darkcoin-abe,jeorgen/bitcoin-abe,Max-Coin/maxcoin-abe,Serya05/bitcoin-abe