(Reuters) - Hewlett Packard Enterprise on Thursday unveiled a plan targeting gross savings of at least $1 billion (817.6 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 5.4% in extended trading after the company missed second-quarter revenue and profit estimates."The global economic lockdowns since February significantly impacted our fiscal Q2 financial performance,"..