Rollup merge of rust-lang#121197 - beetrees:configure-quotes, r=Nilstrieb

Ensure `./configure` works when `configure.py` path contains spaces

Add quotes around paths that may contains spaces in `configure` to avoid the shell splitting the path into multiple arguments.

Author: Nadrieril

configure

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-script="$(dirname $0)"/src/bootstrap/configure.py
+script="$(dirname "$0")"/src/bootstrap/configure.py
 
 try() {
     cmd=$1
@@ -15,4 +15,4 @@ try python3 "$@"
 try python2.7 "$@"
 try python27 "$@"
 try python2 "$@"
-exec python $script "$@"
+exec python "$script" "$@"