* mips-linux: Enabled tf_safecall_exceptions (it just works, no reason to keep disabled) and also tf_pic_uses_got (so that checks elsewhere in compiler set pi_needs_got flag; actual functionality is not changed because currently MIPS just forces pi_needs_got unconditionally).

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@29360 3ad0048d-3df7-0310-abae-a5850022a9f2