[OpenCL] Remove unwanted signedness conversion from tests
[OpenCL] Remove unwanted signedness conversion from tests

The get_kernel_* functions used in cl20-device-side-enqueue.cl all return
unsigned integers. This patch avoids undesired implicit conversions on the
returned values.

Differential Revision: https://reviews.llvm.org/D52873



git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@344778 91177308-0d34-0410-b5e6-96231b3b80d8

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