Approval tests now uses path relative to cwd, not the catch folder.

This means that bash's autocompletion is actually helpful.
diff --git a/scripts/approvalTests.py b/scripts/approvalTests.py
index 1ac05d1..4a77a51 100644
--- a/scripts/approvalTests.py
+++ b/scripts/approvalTests.py
@@ -22,10 +22,7 @@
 if len(sys.argv) == 2:
     cmdPath = sys.argv[1]
 else:
-    cmdPath = scriptCommon.getBuildExecutable()
-
-if not cmdPath.startswith("/"):
-    cmdPath = os.path.join(catchPath, cmdPath)
+    cmdPath = os.path.join(catchPath, scriptCommon.getBuildExecutable())
 
 overallResult = 0