bump github.com/syndtr/goleveldb to 126854af5e6d #3731

Job	Run time
Basic Checks	1m 25s
Integration Tests (raft)	11m 29s
Unit Tests	22m 50s
Integration Tests (pvtdata)	11m 38s
Integration Tests (pvtdatapurge e2e)	10m 38s
Integration Tests (ledger)	12m 42s
Integration Tests (lifecycle)	6m 4s
Integration Tests (smartbft)	19m 46s
Integration Tests (discovery gossip devmode pluggable)	6m 27s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	17m 15s
Integration Tests (sbe nwo msp)	7m 50s
	2h 8m 4s

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