Qt3D ShaderProgram sources cannot compile on iOS (RHI)

When attempting to use Qt3D ShaderPrograms on iOS, all shaders fail to compile with an empty error message (printed to qDebug as Shader Error: "" <shader source>). This can be reproduced using any Qt example/test that requires Qt3DRender::QMaterial, such as:

• qt3d/tests/manual/rhi/simple-rhi-cpp/simple-rhi-cpp.pro
• qt3d/examples/qt3d/simple-cpp/simple-cpp.pro

Just build these projects for iOS or iOS simulator and run to observe the issue.

The issue seems to be simply a forgotten iOS platform check in SubmissionContext::createShaderProgram within the RHI plugin:

i.e.
#ifdef Q_OS_MACOS
{{ ->}}
{{ #if defined(Q_OS_MACOS) || defined(Q_OS_IOS)}}

With this change I am able to successfully run the above test/example and my own code.