play-audio: use heredoc instead of printf

packages/play-audio/build.sh

@@ -9,7 +9,13 @@ termux_step_make_install () {
 		-lOpenSLES \
 		$TERMUX_PKG_BUILDER_DIR/play-audio.cpp -o $LIBEXEC_BINARY
 
-	printf "#!/bin/sh\n\n# Avoid linker errors due to libOpenSLES.so:\nLD_LIBRARY_PATH= exec $LIBEXEC_BINARY \"\$@\"\n" > $TERMUX_PREFIX/bin/play-audio
+		cat << EOF > $TERMUX_PREFIX/bin/play-audio
+#!/bin/sh
+
+# Avoid linker errors due to libOpenSLES.so:
+LD_LIBRARY_PATH= exec $LIBEXEC_BINARY "\$@"
+EOF
+
 	chmod +x $TERMUX_PREFIX/bin/play-audio
 
 	mkdir -p $TERMUX_PREFIX/share/man/man1/