src: use su instead of sudo

Signed-off-by: Maciej Barć <xgqt@protonmail.com>

src/clean-md5-cache

@@ -34,7 +34,7 @@ if [ -d "${cache}" ]
 then
     if ! rm -fr "${cache}"
     then
-        sudo rm -fr "${cache}" || exit 1
+        su root -c "rm -fr ${cache}" || exit 1
     fi
 else
     echo "No pre-generated md5-cache found in ${cache}"

src/eball

@@ -56,7 +56,7 @@ do
     if [ "$(whoami)" != root ] && [ -z "${EPREFIX}" ]
     then
         echo "Switching to the root account"
-        sudo ebuild "${ebuild}" clean test merge
+        su root -c "ebuild ${ebuild} clean test merge"
     else
         ebuild "${ebuild}" clean test merge
     fi