On x86_64 /lib64 folder is required for stage0 cargo - add a symlink temporarily

Makefile

@@ -6,16 +6,24 @@ all: config-toml
 
 	tar xf rustc-1.47.0-src.tar.gz
 	mkdir rustc-home
+
 	if [ `uname -m` = "armv7l" ]; then \
 	    echo "$$CONFIG_TOML" | sed "s/TARGET/ARM/" > rustc-1.47.0-src/config.toml ; \
 	elif [ `uname -m` = "aarch64" ]; then \
 	    echo "$$CONFIG_TOML" | sed "s/TARGET/AArch64/" > rustc-1.47.0-src/config.toml ; \
 	else \
 	    echo "$$CONFIG_TOML" | sed "s/TARGET/X86/" > rustc-1.47.0-src/config.toml ; \
+	    ln -s /lib /lib64 ; \
 	fi
+
 	cd rustc-1.47.0-src && HOME=$(CURDIR)/rustc-home python3 ./x.py build
 	-cd rustc-1.47.0-src && HOME=$(CURDIR)/rustc-home python3 ./x.py test --verbose --no-fail-fast
 	cd rustc-1.47.0-src && HOME=$(CURDIR)/rustc-home python3 ./x.py install
+
+	if [ `uname -m` != "armv7l" ] && [ `uname -m` != "aarch64" ]; then \
+	    rm -rf /lib64 ; \
+	fi
+
 	rm -rf rustc-home
 	rm -rf rustc-1.47.0-src