[MCL-11154] rx::HLSLCompiler::compileToBinary warning in debug.log

The following warning is shown 4 times in the debug log when starting the launcher:

[0624/222724.685:WARNING:angle_platform_impl.cc(41)] rx::HLSLCompiler::compileToBinary(224): 
C:\fakepath(31,8-56): warning X3571: pow(f, e) will not work for negative f, use abs(f) or conditionally handle negative values if you expect them
C:\fakepath(37,8-26): warning X3571: pow(f, e) will not work for negative f, use abs(f) or conditionally handle negative values if you expect them