Fix rsSetElementAt_half3 for x86_64

http://b/25819476

In AArch64 ABI, half3 parameters get coerced to int2.  The definition of
rsSetElementAtImpl_half3 in libclcore incorrectly takes a half3
parameter.  This caused rsSetElement_half3 to fail on x86_64 where the
ABI handles int2 and half3 differently.  This patch updates the
definition in libclcore to accept an int2 parameter.

Change-Id: Idcaeaeb78731f99c338634dd8666ebd5575da1eb
1 file changed