Bug: ANDROID_NDK_HOME environment variable not inherited

[pswaminathan]

Describe the bug

When including Android NDK repository in WORKSPACE without a path set, Bazel looks at the value of ANDROID_NDK_HOME. Xcode fails to build because it does not inherit this environment variable.

Reproduction steps

1. Add an Android NDK repository rule, e.g.:

android_ndk_repository(
    name = "androidndk",
    api_level = 25,
)

2. Set ANDROID_NDK_HOME envvar
3. Run xcodeproj to generate project
4. Launch Xcode pointed to rules_xcodeproj-generated project
5. Fails at analysis

Expected behavior

Versions

• Bazel: 6.0.0rc1
• rules_xcodeproj: 0.10.2
• rules_apple:
• rules_swift:

Additional context