meson: only enable intel-clc for x86_64 builds
Avoid overhead and issues trying to build it for 32 bits, with the assumption that 32 bit Vulkan applications wishing to make use of Ray Tracing will be non-existent.
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Avoid overhead and issues trying to build it for 32 bits, with the assumption that 32 bit Vulkan applications wishing to make use of Ray Tracing will be non-existent.