(Reuters) - Hewlett Packard Enterprise on Thursday unveiled a plan targeting gross savings of at least $1 billion (817.5 million pounds) by 2022 and cut the base salaries of top executives by 25% as the software maker seeks to weather the coronavirus crisis.Shares, down about 35% this year, fell nearly 6% in extended trading after the company missed second-quarter revenue and profit estimates, hit by global lockdowns since February.Chief Executive Officer Antonio Neri flagged concerns about..