postmain zcall added; need to recompile glibc
fs export action moved from exit into postmain call
zrt api extended
alloc report implementation
clfags/ldflags to build with alloc report enabled
extending reserved channels list for alloc report
test suite extended with alloc reporting feature
added subtest for memory leaks testing
extended list of expected files in fs, for alloc report support
pth-2.0.7 for zerovm

The sources taken from https://github.com/YaroslavLitvinov/pth-2.0.7
made changes:
1. configure disabled;
2. not supported functions (sigaction, waitpid, kill, fork) that
leads to warnings replaced by empty macroses.
pth build and cleanup from main make
test for pth pthread
updated c constructor test
extra verifying of file handle

This fix crash when doing 'make trace' when at session finalization
it's trying to write file that have been closed;