apksigner&termux-am: Avoid using gradle daemon

By default gradle spawns a daemon which keeps on running in the
background long after the package has been built and taking up
precious ram. Avoid this.

packages/apksigner/build.sh

@@ -12,7 +12,7 @@ termux_step_make () {
 
 	cp apksigner.1 $TERMUX_PREFIX/share/man/man1/
 
-	./gradlew
+	GRADLE_OPTS=" -Dorg.gradle.daemon=false" ./gradlew
 	$TERMUX_D8 \
 		--classpath $ANDROID_HOME/platforms/android-$TERMUX_PKG_API_LEVEL/android.jar \
 		--release \

packages/termux-am/build.sh

@@ -10,7 +10,7 @@ TERMUX_PKG_CONFLICTS="termux-tools (<< 0.51)"
 
 termux_step_make () {
 	export ANDROID_HOME
-	./gradlew :app:assembleRelease
+	GRADLE_OPTS=" -Dorg.gradle.daemon=false" ./gradlew :app:assembleRelease
 }
 
 termux_step_make_install () {