Update OSS download fix-up commands

Author: Jason Mobarak

README.md

@@ -23,7 +23,7 @@ HOST_LLVM_OBFUSCATOR_DEPENDENCIES = host-xz
 
 define HOST_LLVM_OBFUSCATOR_PRE_EXTRACT_FIXUP
 	if ! [ -e $(DL_DIR)/$(HOST_LLVM_OBFUSCATOR_ACTUAL_SOURCE_TARBALL) ]; then \
-		mv -v $(DL_DIR)/$(HOST_LLVM_OBFUSCATOR_SOURCE) $(DL_DIR)/$(HOST_LLVM_OBFUSCATOR_ACTUAL_SOURCE_TARBALL); fi
+		mv -v $(DL_DIR)/$(shell basename $(HOST_LLVM_OBFUSCATOR_SOURCE)) $(DL_DIR)/$(HOST_LLVM_OBFUSCATOR_ACTUAL_SOURCE_TARBALL); fi
 	$(eval HOST_LLVM_OBFUSCATOR_SOURCE=$(HOST_LLVM_OBFUSCATOR_ACTUAL_SOURCE_TARBALL))
 endef