Clarify license terms for Romain Guy's artwork.

As discussed with Romain Guy in the email thread, the Apache 2.0
license applies to the affected .jpg files now and retroactively from
the time of import.

The images were altered using the exiftool:

exiftool -WebStatement=http://www.apache.org/licenses/LICENSE-2.0

Change-Id: Ie5b968b213a0f22416d8f46172a59eabb4ae3923
diff --git a/build-system/integration-test/test-projects/ndkRsHelloCompute/src/main/res/drawable/data.jpg b/build-system/integration-test/test-projects/ndkRsHelloCompute/src/main/res/drawable/data.jpg
index 81a87b1..b7a0cbd 100644
--- a/build-system/integration-test/test-projects/ndkRsHelloCompute/src/main/res/drawable/data.jpg
+++ b/build-system/integration-test/test-projects/ndkRsHelloCompute/src/main/res/drawable/data.jpg
Binary files differ
diff --git a/build-system/integration-test/test-projects/renderscript/src/main/res/drawable/data.jpg b/build-system/integration-test/test-projects/renderscript/src/main/res/drawable/data.jpg
index 81a87b1..b7a0cbd 100644
--- a/build-system/integration-test/test-projects/renderscript/src/main/res/drawable/data.jpg
+++ b/build-system/integration-test/test-projects/renderscript/src/main/res/drawable/data.jpg
Binary files differ