cmocka: Add explicit libc_alloc, realloc, free
cmocka: Add explicit libc_alloc, realloc, free

Signed-off-by: Jakub Hrozek <17cd138b925932d6ed84ede56550124a0b538ee0@posteo.se>

VladimirTyrin/cmocka,JonathonReinhart/cmocka,dsch/cmocka,wingyplus/cmocka,jamesmunns/CMocka,VladimirTyrin/cmocka,wingyplus/cmocka,JonathonReinhart/cmocka,tyc/cmocka,jhrozek/cmocka,tyc/cmocka,jamesmunns/CMocka,jhrozek/cmocka,dsch/cmocka,tyc/cmocka,clibs/cmocka,jhrozek/cmocka,clibs/cmocka