[FAB-10866] Build fails license header check pptx

Ignore license header check fo *.pptx file.

Change-Id: Ie4b81a837019fcdbf03de4783991dcd3bb83610f
Signed-off-by: Daisuke IIZUKA <daisuke.iizuka.ag@hitachi.com>

Author: Daisuke IIZUKA

scripts/check_license.sh

@@ -30,6 +30,7 @@ function filterExcludedFiles {
 		| grep -v "^Gopkg\.lock$" \
 		| grep -v "\.md$" \
 		| grep -v "\.pb\.go$" \
+		| grep -v "\.pptx$" \
 		| sort -u`
 
   CHECK=$(filterGeneratedFiles "$CHECK")