tools: patch gyp to avoid xcrun errors
tools: patch gyp to avoid xcrun errors

Previously running ./configure with only the Xcode Command Line Tools
installed would give:

xcrun: error: unable to lookup item 'PlatformPath' from command line tools installation
xcrun: error: unable to lookup item 'PlatformPath' in SDK '/'

Co-authored-by: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>
Fixes: https://github.com/nodejs/node/issues/12531

PR-URL: https://github.com/nodejs/node/pull/21520
Reviewed-By: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>
Reviewed-By: Joyee Cheung <c24c8f580289b8360adc3fe49d66727180fe8aa3@gmail.com>
Reviewed-By: Gibson Fahnestock <c0a850ada395a21aea35ea96f1fadcdd1d6eb48b@gmail.com>
Reviewed-By: Refael Ackermann <0604a90ccdde7a0adfa2ff3857349859a7209740@gmail.com>
Reviewed-By: James M Snell <2d64a127ffc94dbe6295928a16bedf8b26814159@gmail.com>

refack/node-gyp,refack/node-gyp,TooTallNate/node-gyp,TooTallNate/node-gyp,TooTallNate/node-gyp,TooTallNate/node-gyp,refack/node-gyp,refack/node-gyp,refack/node-gyp,TooTallNate/node-gyp