fix(maker-flatpak): add eu-strip to required external binaries (#1703)
fix(maker-flatpak): add eu-strip to required external binaries (#1703)

Needed due to zypak sandboxing for Electron >= 5.

Fixes #1702.
electron-userland/electron-forge,electron-userland/electron-forge,electron-userland/electron-forge,electron-userland/electron-forge