added mutex code to each memory object (for --with-unlocked)

Rev: src/array.c:1.103
Rev: src/array.h:1.33
Rev: src/constants.c:1.29
Rev: src/constants.h:1.17
Rev: src/mapping.h:1.36
Rev: src/multiset.c:1.33
Rev: src/multiset.h:1.18
Rev: src/object.c:1.167
Rev: src/object.h:1.61
Rev: src/pike_cpulib.c:1.2
Rev: src/pike_cpulib.h:1.9
Rev: src/pike_threadlib.h:1.1
Rev: src/program.c:1.309
Rev: src/program.h:1.123
Rev: src/svalue.h:1.87
Rev: src/threads.h:1.113