ci(check-copyright): allow Apache-2.0 license

We are permitted to redistribute Apache-2.0 code, but doing so currently
triggers an error in the copyright check script.

Signed-off-by: Chris Kay <chris.kay@arm.com>
Change-Id: I88fd228d209a525410fab66397461b55d4b5f6bd
diff --git a/script/static-checks/check-copyright.py b/script/static-checks/check-copyright.py
index a6d93d7..227a11e 100755
--- a/script/static-checks/check-copyright.py
+++ b/script/static-checks/check-copyright.py
@@ -62,7 +62,7 @@
 TIME_PERIOD = '[0-9]{4}(-[0-9]{4})?'
 
 # Any string with valid license ID, don't allow adding postfix
-LICENSE_ID = '.*(BSD-3-Clause|BSD-2-Clause-FreeBSD|MIT)([ ,.\);].*)?'
+LICENSE_ID = '.*(BSD-3-Clause|BSD-2-Clause-FreeBSD|MIT|Apache-2.0)([ ,.\);].*)?'
 
 # File must contain both lines to pass the check
 COPYRIGHT_LINE = LINE_START + 'Copyright' + '.*' + TIME_PERIOD + '.*' + EOL