Fix HIP_PLATFORM macros #156

Job	Run time
Check file changes	29s
Test Intel on ubuntu-20.04	11m 54s
Test on Mac	19m 19s
Test on ubuntu-latest	3m 55s
Test on ubuntu-20.04	3m 0s
Test run example 1 - meshfem3D simple model	6m 31s
Test run example 3 - layered halfspace	5m 56s
Test run example 0 - make tests	11m 2s
Test run example 11 - poroelastic	4m 39s
Test run example 12 - PML elastic	4m 33s
Test run example 10 - homogeneous halfspace	4m 49s
Test run example 2 - fault tpv5	7m 6s
Test run example 4 - small adjoint	4m 52s
Test run example 5 - socal1D	4m 31s
Test run example 6 - socal1D 1d_socal	4m 0s
Test run example 7 - socal1D 1d_prem	3m 50s
Test run example 8 - socal1D 1d_cascadia	3m 54s
Test run example 9 - coupling FK	4m 47s
Test run example 13 - PML acoustic	4m 34s
Test run example 14 - waterlayered halfspace	6m 19s
Test run example 15 - tomographic model	3m 34s
Test run example 16 - cavity	4m 20s
Test run example 17 - sep bathymetry	3m 50s
	2h 11m 44s

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