Use bazel --version to check the bazel version
Please use `bazel --version` to check the version of Bazel. The currently used variant ignores the bazel-startup-options and actually starts a full bazel server which is a) overkill and b) wrong in case of options like `--output-user-root` and no or readonly home folders

Potential change:
```
try:
  version_output = shell([bazel_path, "--version"])
except subprocess.CalledProcessError:
  return False
match = re.search("(Build label:|bazel) *([0-9\\\\.]+)", version_output)
```

I kept the regexp generic enough so that you can still fall back to the current `bazel version` call and parse both kinds of output
diff --git a/build/build.py b/build/build.py
index dc2750420..c74346563 100755
--- a/build/build.py
+++ b/build/build.py
@@ -209,7 +209,7 @@ def get_bazel_path(bazel_path_flag):
 
 def check_bazel_version(bazel_path):
   try:
-    version_output = shell([bazel_path, "--bazelrc=/dev/null", "version"])
+    version_output = shell([bazel_path, "--version"])
   except subprocess.CalledProcessError:
     return False
   match = re.search("Build label: *([0-9\\\\.]+)[^0-9\\\\.]", version_output)
['build/build.py']