add pinning script to include copied code into this file, original file from fab...

[todo]

fabric-peer-ext/pkg/transientstore/common/common_store_helper.go

Lines 19 to 24 in e68ed45

	// TODO add pinning script to include copied code into this file, original file from fabric is found in fabric/core/transientstore/store_helper.go
	// TODO below functions are originally unexported, the pinning script must capitalize these functions to export them
	var (
	prwsetPrefix = []byte("P")[0] // key prefix for storing private write set in transient store.
	purgeIndexByHeightPrefix = []byte("H")[0] // key prefix for storing index on private write set using received at block height.

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This issue was generated by todo based on a TODO comment in e68ed45. It's been assigned to @fqutishat because they committed the code.