build: check lld version for linker scripts

[devsnek]

Fixes #31249

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
  /node/blob/master/doc/guides/contributing/pull-requests.md#commit-message-guidelines)

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/28329/

[bnoordhuis]

This doesn't look correct to me although the CI seems to accept it... Here is what happens when I run cc -Xlinker -v on my MBA:

$ cc -v
Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin18.7.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

$ cc -Xlinker -v
@(#)PROGRAM:ld  PROJECT:ld64-450.3
BUILD 18:16:53 Apr  5 2019
configured to support archs: armv6 armv7 armv7s arm64 arm64e arm64_32 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em
Library search paths:
        /usr/local/lib
        /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib
Framework search paths:
        /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

$ echo $?
1

proc.communicate() returns a (None, None) tuple.

A proper invocation needs to:

1. ensure that the linker is actually invoked (e.g. -c won't do)
2. trick cc into thinking the linker actually did something

The python equivalent of echo 'int main(){}' | cc -Xlinker -v -P -x c -o /dev/null - would do it but it's perhaps not very elegant...

[devsnek]

Hmm. --version seems to work on ld.lld, lld-link, and wasm-ld, but not ld64.lld. I'm not really sure what to do.