Merge pull request #288 from compnerd/position-independent

tests: pass `verify_json.expected` as absolute path

Author: compnerd

Tests/Functional/ListTests/main.swift

@@ -3,7 +3,7 @@
 // RUN: %{xctest_checker} %t_list %s
 // RUN: %T/ListTests --dump-tests-json > %t_json || true
 // RUN: %T/ListTests --verify %t_json > %t_verify
-// RUN: %{xctest_checker} %t_verify verify_json.expected
+// RUN: %{xctest_checker} %t_verify %S/verify_json.expected
 
 #if os(macOS)
     import SwiftXCTest