pfetch: fix android issues

pfetch

@@ -1326,6 +1326,11 @@ main() {
     # This gives full control over what it displayed on the screen.
     exec 6>&1 >/dev/null
 
+    # Ensure that the 'TMPDIR' is writable as heredocs use it and
+    # fail without the write permission. This was found to be the
+    # case on Android where the temporary directory requires root.
+    [ -w "${TMPDIR:-/tmp}" ] || export TMPDIR=~
+
     # Generic color list.
     # Disable warning about unused variables.
     # shellcheck disable=2034