Update references to mbedtls_dev

Change these to point to the new mbedtls_framework module in the
framework submodule.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/scripts/abi_check.py b/scripts/abi_check.py
index 8a604c4..d3d2bd0 100755
--- a/scripts/abi_check.py
+++ b/scripts/abi_check.py
@@ -101,7 +101,7 @@
 
 import xml.etree.ElementTree as ET
 
-from mbedtls_dev import build_tree
+from mbedtls_framework import build_tree
 
 
 class AbiChecker: