Support for function pointers in pnut-exe #365

Job	Run time
build-without-warnings	31s
catch-bad-whitespace	2s
bootstrap-pnut-exe (bash, i386_linux)	4m 23s
bootstrap-pnut-sh (bash)	1m 27s
bootstrap-pnut-exe (bash, x86_64_linux)	4m 9s
bootstrap-pnut-sh (dash)	2m 28s
bootstrap-pnut-exe (bash, x86_64_mac)	3m 55s
bootstrap-pnut-sh (ksh)	51s
bootstrap-pnut-exe (dash, i386_linux)	11m 48s
bootstrap-pnut-sh (mksh)	16m 54s
bootstrap-pnut-exe (dash, x86_64_linux)	12m 40s
bootstrap-pnut-sh-with-pnut-exe (i386_linux)	14s
bootstrap-pnut-sh (yash)	1m 52s
bootstrap-pnut-sh-with-pnut-exe (x86_64_linux)	9s
bootstrap-pnut-sh (zsh)	14m 37s
bootstrap-pnut-sh-with-pnut-exe (x86_64_mac)	19s
bootstrap-pnut-exe (dash, x86_64_mac)	7m 13s
bootstrap-pnut-exe (ksh, i386_linux)	1m 53s
tests-exe (i386_linux, ubuntu-latest)	12s
bootstrap-pnut-exe (ksh, x86_64_linux)	1m 55s
tests-shell (bash)	24s
tests-exe (x86_64_linux, ubuntu-latest)	13s
bootstrap-pnut-exe (ksh, x86_64_mac)	1m 20s
tests-shell (dash)	16s
tests-shell (ksh)	26s
bootstrap-bash-2_05a	1m 16s
tests-exe (x86_64_mac, macos-latest)	14s
tests-shell (mksh)	1m 56s
tests-shell (yash)	1m 29s
compile-in-safe-mode	14s
tests-shell (zsh)	31s
pnut-variants-run (reader)	1m 16s
pnut-variants-run (tokenizer)	40s
pnut-variants-run (parser)	49s
success-message	0s
	1h 38m 36s

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