rstconv: fixed memory leak

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26484 3ad0048d-3df7-0310-abae-a5850022a9f2
utils: clean rsj files by delp

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26485 3ad0048d-3df7-0310-abae-a5850022a9f2