libc/misc: Mark lock functions as weak (#1) #15

Job	Run time
cache-maker	6m 29s
minsize-zephyr (./.github/do-zephyr)	20m 6s
release-zephyr (./.github/do-zephyr)	21m 21s
minsize-zephyr (-Dio-float-exact=false -Dio-long-long=true -Dio-percent-b=true -Dio-long-double=t...	21m 48s
release-zephyr (-Dio-float-exact=false -Dio-long-long=true -Dio-percent-b=true -Dio-long-double=t...	21m 42s
minsize-zephyr (-Dformat-default=integer -Dfreestanding=true -Dposix-io=false -Dnewlib-obsolete-m...	21m 14s
release-zephyr (-Dformat-default=integer -Dfreestanding=true -Dposix-io=false -Dnewlib-obsolete-m...	21m 23s
minsize-zephyr (-Dtinystdio=false, ./.github/do-zephyr)	18m 50s
release-zephyr (-Dtinystdio=false, ./.github/do-zephyr)	20m 1s
minsize-zephyr (-Dtinystdio=false -Dnewlib-io-float=true -Dio-long-long=true -Dio-long-double=tru...	18m 4s
release-zephyr (-Dtinystdio=false -Dnewlib-io-float=true -Dio-long-long=true -Dio-long-double=tru...	18m 42s
	3h 29m 40s

Provide feedback