Emit numeric literal in the base they are parsed in pnut-sh #380

Job	Run time
bootstrap-bash-2_05a	51s
bootstrap-pnut-sh-with-pnut-exe (i386_linux)	12s
bootstrap-pnut-exe (bash, i386_linux)	54s
bootstrap-pnut-sh-with-pnut-exe (x86_64_linux)	11s
bootstrap-pnut-sh (bash)	55s
bootstrap-pnut-exe (bash, x86_64_linux)	53s
build-without-warnings	23s
bootstrap-pnut-sh-with-pnut-exe (x86_64_mac)	17s
bootstrap-pnut-sh (dash)	55s
bootstrap-pnut-exe (bash, x86_64_mac)	51s
bootstrap-pnut-sh (ksh)	43s
bootstrap-pnut-exe (dash, i386_linux)	53s
catch-bad-whitespace	3s
compile-in-safe-mode	16s
bootstrap-pnut-exe (dash, x86_64_linux)	37s
bootstrap-pnut-exe (dash, x86_64_mac)	46s
bootstrap-pnut-sh (mksh)	54s
pnut-variants-run (reader)	54s
bootstrap-pnut-sh (yash)	54s
bootstrap-pnut-exe (ksh, i386_linux)	37s
tests-exe (i386_linux, ubuntu-latest)	12s
bootstrap-pnut-sh (zsh)	55s
pnut-variants-run (tokenizer)	40s
bootstrap-pnut-exe (ksh, x86_64_linux)	33s
tests-exe (x86_64_linux, ubuntu-latest)	1s
pnut-variants-run (parser)	47s
bootstrap-pnut-exe (ksh, x86_64_mac)	33s
tests-exe (x86_64_mac, macos-latest)	1s
tests-shell (bash)	1s
tests-shell (dash)	1s
tests-shell (ksh)	1s
tests-shell (mksh)	1s
tests-shell (yash)	1s
tests-shell (zsh)	1s
success-message	1s
	16m 48s

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