Update copyright headers.

- Add copyright headers to files that did not already have them
- Update the year to the last year the file was modified in files with
  existing headers.

wa/workloads/pcmark/uiauto/app/src/main/java/com/arm/wa/uiauto/pcmark/UiAutomation.java

@@ -1,4 +1,4 @@
-/*    Copyright 2014-2016 ARM Limited
+/*    Copyright 2014-2018 ARM Limited
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

wa/workloads/pcmark/uiauto/build.sh

@@ -1,4 +1,19 @@
 #!/bin/bash
+#    Copyright 2018 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 
 # CD into build dir if possible - allows building from any directory
 script_path='.'