Revert "fixed makpekg not using pacman --root argument"

This reverts commit 2a79160d49f6f26e7b64feaab2adbec162e5df57.
Revert "fixed --root argument not passed to pacman"

This reverts commit 58868818879bba70b8146b3905acc3a6a4ffd2d1.
unsupported --root option