[Lit] Add CHECK-%vendor to IRGenFileCheck.

Author: nate-chandler

test/lit.cfg

@@ -3266,14 +3266,15 @@ else:
 
 # A FileCheck that automatically supports a large variety of target
 # conditionalization that's useful in IRGen.
-IRGenFileCheck = '%s --check-prefix=CHECK --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s -DINT=i%s -DPTR_SIZE=%s -D#CLASS_METADATA_HEADER=%s' % (
+IRGenFileCheck = '%s --check-prefix=CHECK --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s --check-prefix=CHECK-%s -DINT=i%s -DPTR_SIZE=%s -D#CLASS_METADATA_HEADER=%s' % (
  run_filecheck,
  run_os,
  run_cpu,
  run_endian,
  run_ptrsize,
  run_ptrauth,
  run_objc_interop,
+ run_vendor,
  run_ptrsize,
  run_ptrsize,
  run_class_metadata_header_size)