CL/Vulkan: Fix missing init() for clLinkProgram

Fixing missed init() call/routine when creating
the CLProgramVk object during clLinkProgram.

Bug: angleproject:366411889
Change-Id: I13402b823746a59b3f0539830a6cde64b6201ae9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5860305
Reviewed-by: Shahbaz Youssefi <[email protected]>
Commit-Queue: Austin Annestrand <[email protected]>
Reviewed-by: Geoff Lang <[email protected]>

src/libANGLE/renderer/vulkan/CLContextVk.cpp

@@ -188,6 +188,7 @@ angle::Result CLContextVk::linkProgram(const cl::Program &program,
     {
         ANGLE_CL_RETURN_ERROR(CL_OUT_OF_HOST_MEMORY);
     }
+    ANGLE_TRY(programImpl->init());
 
     cl::DevicePtrs linkDeviceList;
     CLProgramVk::LinkProgramsList linkProgramsList;