fix prototypes of stest and ctest for INTERFACE64 #515

Job	Run time
build (ubuntu-latest, gfortran, cmake)	15m 43s
build (ubuntu-latest, gfortran, make)	6m 42s
build (ubuntu-latest, flang, cmake)	11m 33s
build (ubuntu-latest, flang, make)	5m 57s
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	4m 56s
build (macos-latest, gfortran, cmake)	33m 8s
msys2 (MINGW64, int32, Release)	19m 39s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	4m 34s
build (macos-latest, gfortran, make)	11m 22s
msys2 (MINGW64, int64, Release)	21m 29s
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	5m 9s
msys2 (MINGW32, int32, Release)	22m 24s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	3m 27s
msys2 (CLANG64, int32, Release)	23m 58s
msys2 (CLANG64, int64, Release)	21m 32s
msys2 (CLANG32, int32, Release)	14m 40s
msys2 (MINGW64, int32, None, mingw-w64-x86_64, fc)	18m 25s
	4h 4m 38s

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