Avoid infinite recursion on generic classes for IDE browser

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26068 3ad0048d-3df7-0310-abae-a5850022a9f2
 Put both _environ and __environ as .comm inside startup script to avoid crt1.o loading

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26069 3ad0048d-3df7-0310-abae-a5850022a9f2