fixup! fixup! APPS/pkey: fix case where infile and outfile are the same #1254

Job	Run time
compiler (gcc-7, ubuntu-20.04)	4m 49s
compiler (gcc-8, ubuntu-20.04)	4m 16s
compiler (gcc-9, ubuntu-20.04)	4m 41s
compiler (gcc-10, ubuntu-20.04)	4m 18s
compiler (gcc-11, ubuntu-22.04)	4m 37s
compiler (gcc-12, ubuntu-22.04)	5m 23s
compiler (gcc-13, ubuntu-22.04, ubuntu-toolchain-r/test)	7m 4s
compiler (clang-6.0, ubuntu-20.04)	5m 28s
compiler (clang-7, ubuntu-20.04)	5m 20s
compiler (clang-8, ubuntu-20.04)	5m 27s
compiler (clang-9, ubuntu-20.04)	5m 30s
compiler (clang-10, ubuntu-20.04)	5m 2s
compiler (clang-11, ubuntu-20.04)	5m 6s
compiler (clang-12, ubuntu-20.04)	4m 42s
compiler (clang-13, ubuntu-22.04)	5m 14s
compiler (clang-14, ubuntu-22.04)	4m 53s
compiler (clang-15, ubuntu-22.04, jammy)	6m 18s
compiler (clang-16, ubuntu-22.04, jammy)	5m 21s
compiler (clang-17, ubuntu-22.04, jammy)	5m 13s
	1h 38m 42s

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