Add missing copyright dates to scripts and sources

To find any files with a missing copyright declaration, use the following script:

# ========================
#!/bin/sh

# Find files with copyright declarations, and list their file extensions
exts=$(grep -Ril --exclude-dir .git --exclude-dir 3rdparty\
                 --exclude-dir programs/fuzz 'Copyright.*Arm' | sed '
  s/.*\///
  s/.*\./*./
  s/.*/-name "&"/
' | sort -u | sed -n '
  :l
    N
    $!bl
  s/\n/ -o /gp
')

# Find files with file extensions that ususally include copyright extensions,
# but don't include a copyright declaration themselves.
eval "find\
  '(' -path './.git' -o -path './3rdparty' -o -path './programs/fuzz' ')' -prune\
  -o ! -path './tests/data_files/format_pkcs12.fmt'\
     ! -path './programs/psa/psa_constant_names_generated.c'\
     '(' $exts ')' -print" | xargs grep -Li 'Copyright.*Arm'
# ========================

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
diff --git a/tests/scripts/psa_collect_statuses.py b/tests/scripts/psa_collect_statuses.py
index e38beea..78b5c19 100755
--- a/tests/scripts/psa_collect_statuses.py
+++ b/tests/scripts/psa_collect_statuses.py
@@ -12,6 +12,10 @@
 only supported with make (as opposed to CMake or other build methods).
 """
 
+# Copyright (C) 2019, Arm Limited, All Rights Reserved
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
+
 import argparse
 import os
 import subprocess