Revert "Revert "Switch to using $HOME instead of ~ in Travis configuration.""
Revert "Revert "Switch to using $HOME instead of ~ in Travis configuration.""

This reverts commit 1b6116668ba251e0eece23503b08e3af45b50489.

MozillaSecurity/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz