Fix SLEEF_BUILD_SCALAR_LIB lost function #95

Job	Run time
build-native-gcc	4m 11s
build-native-llvm	8m 41s
test-native-gcc	8m 41s
test-native-llvm	8m 20s
build-aarch64-gcc	3m 37s
build-aarch64-llvm	7m 6s
build-armhf-gcc	1m 28s
build-armhf-llvm	1m 29s
build-ppc64el-gcc	3m 8s
build-ppc64el-llvm	4m 2s
build-s390x-gcc	1m 59s
build-s390x-llvm	2m 14s
build-riscv64-llvm	1m 42s
test-aarch64-gcc (qemu_cpu: "max,sve=off")	16m 33s
test-aarch64-gcc (qemu_cpu: "max,sve=on,sve128=on")	22m 52s
test-aarch64-gcc (qemu_cpu: "max,sve=on,sve256=on")	29m 44s
test-aarch64-gcc (qemu_cpu: "max,sve=on,sve512=on")	29m 14s
test-aarch64-llvm (qemu_cpu: "max,sve=off")	15m 54s
test-aarch64-llvm (qemu_cpu: "max,sve=on,sve128=on")	20m 54s
test-aarch64-llvm (qemu_cpu: "max,sve=on,sve256=on")	26m 44s
test-aarch64-llvm (qemu_cpu: "max,sve=on,sve512=on")	31m 16s
test-armhf-gcc (qemu_cpu: "max")	16m 58s
test-armhf-llvm (qemu_cpu: "max")	16m 12s
test-ppc64el-gcc (qemu_cpu: "power10")	26m 43s
test-ppc64el-llvm (qemu_cpu: "power10")	25m 42s
test-s390x-gcc (qemu_cpu: "")	20m 17s
test-s390x-llvm (qemu_cpu: "")	18m 15s
test-riscv64-llvm (qemu_cpu: "rv64,zba=true,zbb=true,zbs=true,v=false")	6m 58s
test-riscv64-llvm (qemu_cpu: "rv64,zba=true,zbb=true,zbs=true,v=true,vlen=128,elen=64,vext_spec=v1.0")	16m 51s
test-riscv64-llvm (qemu_cpu: "rv64,zba=true,zbb=true,zbs=true,v=true,vlen=256,elen=64,vext_spec=v1.0")	19m 46s
test-riscv64-llvm (qemu_cpu: "rv64,zba=true,zbb=true,zbs=true,v=true,vlen=512,elen=64,vext_spec=v1.0")	34m 19s
	7h 31m 50s

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