git p4 test: use real_path to resolve p4 client symlinks

diff --git a/RelNotes b/RelNotes
index f8e49a5070afc21fbd3db9320841300fe93c570f..ceedb902ca9fb8c9ee58b7c06348eaf767f715bc 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.6.4.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.11.1.txt
\ No newline at end of file