feat(auto update): add utility function to exit on error

Signed-off-by: Aditya Alok <dev.aditya.alok@gmail.com>

scripts/updates/utils/termux_error_exit.sh

@@ -0,0 +1,10 @@
+# shellcheck shell=bash
+termux_error_exit() {
+	if [ "$#" -eq 0 ]; then
+		# Read from stdin.
+		printf '%s\n' "$(cat)" >&2
+	else
+		printf '%s\n' "$*" >&2
+	fi
+	exit 1
+}