scripts: fpdiff: Initialise Colorama during start-up

This commit adds a call to the Colorama initialisation function during
the module execution so that ANSI color sequences are properly
converted to the relevant Win32 API calls on the Windows.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
diff --git a/scripts/footprint/fpdiff.py b/scripts/footprint/fpdiff.py
index 7027250..6f62fc6 100755
--- a/scripts/footprint/fpdiff.py
+++ b/scripts/footprint/fpdiff.py
@@ -18,6 +18,7 @@
 from anytree import PreOrderIter
 from anytree.search  import find
 
+import colorama
 from colorama import Fore
 import json
 import argparse
@@ -33,6 +34,8 @@
     return parser.parse_args()
 
 def main():
+    colorama.init()
+
     args = parse_args()
 
     with open(args.file1, "r") as f: