Add Support for Annex K functions according to C11 #125

Job	Run time
cache-maker	6s
release-zephyr (./.github/do-zephyr)	38m 38s
minsize-zephyr (./.github/do-zephyr)	36m 55s
release-zephyr (-Dio-float-exact=false -Dio-long-long=true -Dio-percent-b=true -Dio-long-double=t...	37m 47s
minsize-zephyr (-Dio-float-exact=false -Dio-long-long=true -Dio-percent-b=true -Dio-long-double=t...	37m 8s
release-zephyr (-Dformat-default=integer -Dfreestanding=true -Dposix-io=false -Dnewlib-obsolete-m...	37m 53s
minsize-zephyr (-Dformat-default=integer -Dfreestanding=true -Dposix-io=false -Dnewlib-obsolete-m...	36m 59s
release-zephyr (-Dtinystdio=false, ./.github/do-zephyr)	22m 10s
minsize-zephyr (-Dtinystdio=false, ./.github/do-zephyr)	20m 30s
release-zephyr (-Dtinystdio=false -Dnewlib-io-float=true -Dio-long-long=true -Dio-long-double=tru...	10m 30s
minsize-zephyr (-Dtinystdio=false -Dnewlib-io-float=true -Dio-long-long=true -Dio-long-double=tru...	10m 59s
	4h 49m 35s

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