Revert "* updated checksums for the latest release candidates"

This reverts commit b2d13c15af2149cb6c51ee5b7495f2a2474bbaf4.
Revert "Merge branch 'master' of https://github.com/mgerhardy/mxe into mgerhardy-master"

This reverts commit 9c4386e2f7f81f905d04c00a7e19d3d064c20f51, reversing
changes made to b54718e2208edc3871ca443e4318a2a0bf68a026.