Fix bad search and replace.

Signed-off-by: Garrett Cooper <yanegomi@gmail.com>
diff --git a/testscripts/ltp-aiodio.sh b/testscripts/ltp-aiodio.sh
index fb82e03..e7f7f51 100755
--- a/testscripts/ltp-aiodio.sh
+++ b/testscripts/ltp-aiodio.sh
@@ -16,7 +16,7 @@
  cd ..
  export LTPROOT=${PWD}
 fi
-export PATH=$LTPROOT$TMPcases/bin:$PATH
+export PATH=$LTPROOT/testcases/bin:$PATH
 export TMP=${TMP:=/tmp}
 
 run0=0