obj: fix typo in comment
libpmem.h: add missing header stdint.h

The uint64_t type requires stdint.h, for example.
Merge pull request #5 from ldorau/obj-fix-typo-in-comment

obj: fix typo in comment
Merge pull request #6 from ldorau/libpmem.h-add-missing-header-stdint.h

libpmem.h: add missing header stdint.h
test: fix trailing whitespaces in obj_basic.c
Merge pull request #7 from ldorau/test-fix-trailing-whitespaces

test: fix trailing whitespaces in obj_basic.c
very basic log example based on pmemobj