This fixed rudimentary symbols without prefix for libtar
Fixed bug caused to abort at exit

Call of postmain handler added to fix abnormal termination of zrt
program if /dev/alloc_report channel was present and also exporting
files feature was enabled in nvram file; Errors were occured while
collecting allocation info, particularly during backtrace call
which is not designed to be called out of bounds of main function.
Merge pull request #144 from YaroslavLitvinov/dev

Dev