intel: properly escape sed pattern for tests

The sed was incorrectly modifying e.g. "nicholasbishop" to
"nicholasbop". The updated pattern will only match `.sh` at the end of
the string.

Signed-off-by: Nicholas Bishop <nicholasbishop@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

intel/tests/test-batch.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-TEST_FILENAME=`echo "$0" | sed 's|.sh||'`
+TEST_FILENAME=`echo "$0" | sed 's|\.sh$||'`
 ./test_decode $TEST_FILENAME
 
 ret=$?