stop relying on rustc's LLVM caches

Author: workingjubilee

lang/rust/Makefile

@@ -75,7 +75,7 @@ HOST_CONFIGURE_ARGS = \
 	--release-channel=stable \
 	--enable-cargo-native-static \
 	--bootstrap-cache-path=$(DL_DIR)/rustc \
-	--set=llvm.download-ci-llvm=true \
+	--set=llvm.download-ci-llvm=false \
 	$(TARGET_CONFIGURE_ARGS)
 
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