Add copyright dates to all scripts

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=$(grep -Ril --exclude-dir .git 'Copyright.*Arm' | sed '
  s/.*\./-name "*./
  s/$/"/
' | 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' -prune -o ! -path './tests/data_files/format_pkcs12.fmt' '(' $exts ')' -print" | xargs grep -Li 'Copyright.*Arm'
# ========================

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>

programs/test/udp_proxy_wrapper.sh

@@ -1,6 +1,10 @@
 #!/bin/sh
 # -*-sh-basic-offset: 4-*-
 # Usage: udp_proxy_wrapper.sh [PROXY_PARAM...] -- [SERVER_PARAM...]
+#
+# Copyright (C) 2017, Arm Limited, All Rights Reserved
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
 
 set -u