Support for function pointers in pnut-exe #357

Job	Run time
bootstrap-pnut-sh (bash)	1m 27s
bootstrap-pnut-sh (dash)	2m 21s
bootstrap-pnut-sh-with-pnut-exe (i386_linux)	11s
bootstrap-pnut-exe (bash, i386_linux)	4m 3s
bootstrap-pnut-sh (ksh)	46s
bootstrap-bash-2_05a	30m 9s
bootstrap-pnut-exe (bash, x86_64_linux)	3m 59s
bootstrap-pnut-sh-with-pnut-exe (x86_64_linux)	11s
bootstrap-pnut-sh (mksh)	17m 2s
bootstrap-pnut-exe (bash, x86_64_mac)	3m 57s
bootstrap-pnut-sh-with-pnut-exe (x86_64_mac)	17s
bootstrap-pnut-sh (yash)	1m 46s
build-without-warnings	1m 47s
bootstrap-pnut-exe (dash, i386_linux)	10m 11s
bootstrap-pnut-sh (zsh)	11m 51s
bootstrap-pnut-exe (dash, x86_64_linux)	13m 6s
catch-bad-whitespace	3s
compile-in-safe-mode	19s
bootstrap-pnut-exe (dash, x86_64_mac)	16m 44s
pnut-variants-run (reader)	25s
bootstrap-pnut-exe (ksh, i386_linux)	1m 57s
pnut-variants-run (tokenizer)	39s
bootstrap-pnut-exe (ksh, x86_64_linux)	1m 51s
tests-exe (i386_linux, ubuntu-latest)	14s
tests-shell (bash)	21s
pnut-variants-run (parser)	1m 36s
bootstrap-pnut-exe (ksh, x86_64_mac)	1m 30s
tests-exe (x86_64_linux, ubuntu-latest)	11s
tests-shell (dash)	17s
tests-exe (x86_64_mac, macos-latest)	18s
tests-shell (ksh)	26s
tests-shell (mksh)	1m 56s
tests-shell (yash)	1m 33s
tests-shell (zsh)	32s
success-message	1s
	2h 13m 57s

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