Fix issues with lock.sh for i3wm/N900 (#1439)

aports/main/postmarketos-ui-i3wm/APKBUILD

 pkgname=postmarketos-ui-i3wm
 pkgver=0.1
-pkgrel=0
+pkgrel=1
 pkgdesc="(X11) Tiling WM (keyboard required)"
 url="https://i3wm.org"
 arch="noarch"
@@ -16,8 +16,8 @@ source="
 options="!check"
 
 package() {
-	install -D -m644 "$srcdir"/lock.sh \
+	install -D -m755 "$srcdir"/lock.sh \
 		"$pkgdir"/usr/bin/lock.sh
 }
 sha512sums="f1556fa83ddecf453333d784004c28d6bd9b7cf4c5ee2c0d31d51e67f5e1fa9949a6dd4377793eeb72e619add0689208fdd497924ebefa778c349a26e57ad30a  postmarketos-ui-i3wm.post-install
-ae41416dc56751825a87024dfe145afcba80a1aba5152280f199dfb3f289626fc8ec6ad38d0f25b7b5e5e74edde1d560e01c71251040d195da47214c4068c702  lock.sh"
+2165141499a830beb33ee42e410ba39104f3e70cd61507f0607115d421846104659fa7e9d4193b3394f7384fc33c2233269bb61c99d5d8a2368aa83500e54b35  lock.sh"

aports/main/postmarketos-ui-i3wm/lock.sh

 #!/bin/sh
 
-FILE=~/tmp/screenoff
+FILE=~/.screenoff
 if [ -f $FILE ]; then
     xinput set-prop 8 "Device Enabled" 1
     xset dpms force on
-    rm ~/.screenoff
+    rm "$FILE"
 else
-    xset dpms force off
     xinput set-prop 8 "Device Enabled" 0
-    touch ~/.screenoff
+    # Turn screen off twice (sometimes it does not work on first run)
+    xset dpms force off
+    xset dpms force off
+    touch "$FILE"
 fi