git p4 test: use real_path to resolve p4 client symlinks

diff --git a/RelNotes b/RelNotes
index d57124075c1451ae51eb17935669a4cedff4c605..ceedb902ca9fb8c9ee58b7c06348eaf767f715bc 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.6.6.1.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.11.1.txt
\ No newline at end of file