Fix hip example compilation error #3797

Job	Run time
git_checks	10s
format	27s
macos (macos11, serial)	4m 50s
linux_ubuntu (ubuntu20.04, gcc8, shared, ompi)	35m 34s
macos (macos12, serial)	5m 13s
linux_ubuntu (ubuntu20.04, gcc9, shared, ompi)	34m 37s
linux_ubuntu (ubuntu20.04, gcc10, shared, ompi)	36m 30s
docker (ubuntu-bionic)	15m 36s
linux_ubuntu (ubuntu20.04, gcc11, shared, ompi)	33m 58s
CodeQL (cpp)	33m 52s
linux_el8 (el8, icc, ompi)	56m 27s
linux_ubuntu (ubuntu20.04, clang6, shared, ompi)	25m 55s
linux_el8 (el8, oneapi, ompi)	59m 15s
linux_ubuntu (ubuntu20.04, clang10, shared, ompi)	38m 3s
windows (win2019, serial)	14m 0s
linux_ubuntu (ubuntu20.04, gcc10, mpich)	58m 15s
windows (win2019, ompi)	27m 47s
linux_ubuntu (ubuntu20.04, gcc8, serial)	12m 16s
windows (win2022, serial)	15m 39s
linux_ubuntu (ubuntu20.04, clang6, serial)	8m 30s
windows (win2022, ompi)	25m 16s
linux_ubuntu (ubuntu20.04, gcc8, static, ompi, build_only)	10m 54s
linux_ubuntu (ubuntu20.04, clang6, static, ompi, build_only)	9m 25s
linux_ubuntu (ubuntu20.04, gcc8, static, serial)	10m 23s
contract (lammps)	6m 14s
contract (tau)	19m 5s
build_and_test	2s
	9h 58m 13s

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