scripts: size_report: Fix colorized output

Colorama needs to be initialized, and for colors to display correctly on
Windows one needs to use the `USES_TERMINAL` option in CMake.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>

cmake/reports/CMakeLists.txt

@@ -15,6 +15,7 @@ foreach(report ram_report rom_report)
     ${flag_for_${report}}
     DEPENDS ${logical_target_for_zephyr_elf}
             $<TARGET_PROPERTY:zephyr_property_target,${report}_DEPENDENCIES>
+    USES_TERMINAL
     )
 endforeach()
 

scripts/footprint/size_report

@@ -27,7 +27,7 @@ from elftools.dwarf.locationlists import (
 if LooseVersion(elftools.__version__) < LooseVersion('0.24'):
     sys.exit("pyelftools is out of date, need version 0.24 or later")
 
-from colorama import Fore
+from colorama import init, Fore
 
 from anytree import RenderTree, NodeMixin, findall_by_attr
 from anytree.exporter import JsonExporter
@@ -586,6 +586,9 @@ def parse_args():
 def main():
     parse_args()
 
+    # Init colorama
+    init()
+
     assert os.path.exists(args.kernel), "{0} does not exist.".format(args.kernel)
 
     elf = ELFFile(open(args.kernel, "rb"))