Extend suppress list for checkpatch and cppcheck

Checkpatch and cppcheck ignore the content of entire lib/ext folder.

Change-Id: Icb305df12063109e7342c0cf6744c4217f5275a4
Signed-off-by: Tamas Ban <tamas.ban@arm.com>
diff --git a/run-checkpatch.sh b/run-checkpatch.sh
index 0bb78a4..3ff328e 100755
--- a/run-checkpatch.sh
+++ b/run-checkpatch.sh
@@ -24,7 +24,7 @@
 ##
 #This is needed for Doxygen for now.
 #!string SKIP_PATHS;
-SKIP_PATHS='./build-\*:./test/\*:./platform/\*:*/tz_\*:./lib/ext/qcbor/\*:./platform/ext/\*:./bl2/ext/\*'
+SKIP_PATHS='./build-\*:./test/\*:./platform/\*:*/tz_\*:./lib/ext/\*:./platform/ext/\*:./bl2/ext/\*'
 
 ##@var TFM_DIRECTORY_NAME
 ##@brief Default path to tf-m source code.