Add helperrvv.h inline header defines. #227

Job	Run time
build-native-gcc	5m 20s
build-native-llvm	5m 54s
test-native-gcc	10m 29s
build-aarch64-gcc	6m 2s
test-native-llvm	7m 20s
build-aarch64-llvm	9m 34s
build-armhf-gcc	7m 6s
build-armhf-llvm	6m 55s
build-ppc64el-gcc	5m 4s
build-ppc64el-llvm	4m 44s
build-s390x-gcc	4m 7s
build-s390x-llvm	4m 22s
build-riscv64-llvm	8m 13s
test-aarch64-gcc (qemu_cpu: "max,sve=off")	16m 59s
test-aarch64-gcc (qemu_cpu: "max,sve=on,sve128=on")	25m 28s
test-aarch64-gcc (qemu_cpu: "max,sve=on,sve256=on")	29m 22s
test-aarch64-gcc (qemu_cpu: "max,sve=on,sve512=on")	29m 43s
test-aarch64-llvm (qemu_cpu: "max,sve=off")	16m 26s
test-aarch64-llvm (qemu_cpu: "max,sve=on,sve128=on")	21m 57s
test-aarch64-llvm (qemu_cpu: "max,sve=on,sve256=on")	29m 12s
test-aarch64-llvm (qemu_cpu: "max,sve=on,sve512=on")	33m 17s
test-armhf-gcc (qemu_cpu: "max")	17m 27s
test-armhf-llvm (qemu_cpu: "max")	16m 18s
test-ppc64el-gcc (qemu_cpu: "power10")	26m 46s
test-ppc64el-llvm (qemu_cpu: "power10")	24m 22s
test-s390x-gcc (qemu_cpu: "")	21m 1s
test-s390x-llvm (qemu_cpu: "")	18m 14s
test-riscv64-llvm (qemu_cpu: "rv64,zba=true,zbb=true,zbs=true,v=false")	5m 21s
test-riscv64-llvm (qemu_cpu: "rv64,zba=true,zbb=true,zbs=true,v=true,vlen=128,elen=64,vext_spec=v1.0")	17m 15s
test-riscv64-llvm (qemu_cpu: "rv64,zba=true,zbb=true,zbs=true,v=true,vlen=256,elen=64,vext_spec=v1.0")	24m 56s
test-riscv64-llvm (qemu_cpu: "rv64,zba=true,zbb=true,zbs=true,v=true,vlen=512,elen=64,vext_spec=v1.0")	40m 5s
	8h 19m 19s

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