more linting

remove K&R old style code

in order to remove K&R code in atomicio.c

now, vwrite comes from atomicio.h

in order to remove K&R code

Support out-of-tree builds usign bundled libtom

When building out-of-tree we need both source and generated
folders in include paths to find both distributed and generated
headers.

When building out-of-tree we need both source and generated
folders in include paths to find both distributed and generated
headers.

This is a workaround since I cannot figure how to get dependencies
to work properly with "make -j"