Fix issue where lack of .tar.xz breaks builds

Makefile

@@ -234,7 +234,7 @@ jre: native
 	cd $(SOURCEDIR)/depends; \
 	$(call METHOD_JAVA_UNPACK,8,'https://github.com/PojavLauncherTeam/android-openjdk-build-multiarch/releases/download/jre8-40df388/jre8-arm64-20220811-release.tar.xz'); \
 	$(call METHOD_JAVA_UNPACK,17,'https://github.com/PojavLauncherTeam/android-openjdk-build-multiarch/releases/download/jre17-ca01427/jre17-arm64-20220817-release.tar.xz'); \
-	rm $(SOURCEDIR)/depends/jre*.tar.xz; \
+	if [ -f "$(ls jre*.tar.xz)" ]; then rm $(SOURCEDIR)/depends/jre*.tar.xz; fi; \
 	cd $(SOURCEDIR); \
 	rm -rf $(SOURCEDIR)/depends/java-*-openjdk/{bin,include,jre,lib/{ct.sym,libjsig.dylib,src.zip,tools.jar}}; \
 	$(call METHOD_DIRCHECK,$(WORKINGDIR)/PojavLauncher.app/jvm); \