[Makefile] Force sed to use extended regex #1492
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Our Jenkins uses image similar to the alpine image in which
sed --versiongives:This is not GNU sed version 4.0which fails when executingecho "0.9.0-rc1" | sed 's/\+/\-/g'onsed: bad regex '\+': Repetition not preceded by valid expressionadding
-Eforces it to use the extended regex which makes it to work