Fixed typo

Added aarch64 for Linux in anaconda_architecture()

plugins/python-build/bin/python-build

@@ -1006,7 +1006,7 @@ anaconda_architecture() {
   "Linux" )
     case "$(uname -m)" in
     "armv7l" ) echo "Linux-armv7l" ;;
-    "aarch64 " ) echo "Linux-aarch64" ;;
+    "aarch64" ) echo "Linux-aarch64" ;;
     "i386" | "i486" | "i586" | "i686" | "i786" ) echo "Linux-x86" ;;
     "ppc64le" ) echo "Linux-ppc64le" ;;
     "x86_64" ) echo "Linux-x86_64" ;;