feat(sptool): use python version of sptool

Change-Id: I567ef0b977c69c38323740a592dd9451e261a407
Signed-off-by: J-Alves <joao.alves@arm.com>
diff --git a/.gitignore b/.gitignore
index f524658..3b0a5ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,6 +32,7 @@
 tools/stm32image/stm32image.exe
 tools/sptool/sptool
 tools/sptool/sptool.exe
+tools/sptool/__pycache__/
 
 # GNU GLOBAL files
 GPATH