Update the llvm-project branch for main config

[shahmishal]

No description provided.

[shahmishal]

@swift-ci test

[justice-adams-apple]

LGTM

[shahmishal]

========================================
Failures:
  FAIL: line-sdk-ios-swift, 5.0, d8bb2b, LineSDK, generic/platform=iOS
  FAIL: line-sdk-ios-swift, 4.2, d8bb2b, LineSDK, generic/platform=iOS
========================================

/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS15.0.sdk/System/Library/Frameworks/SafariServices.framework/Headers/SFAuthenticationSession.h:17:28: error: domain argument does not refer to global constant
typedef NS_ENUM(NSInteger, SFAuthenticationError) {
                           ^
/Users/ec2-user/jenkins/workspace/swift-PR-source-compat-suite-test-macOS/swift-source-compat-suite/project_cache/line-sdk-ios-swift/LineSDK/LineSDK/Login/LoginProcess.swift:24:8: error: could not build Objective-C module 'SafariServices'
import SafariServices

[justice-adams-apple]

@shahmishal should we xfail that project for the time being to get this in? I think all source compat runs which build the compiler will fail until this lands due to using an outdated llvm branch

[justice-adams-apple]

@swift-ci test