patch applied (testsuite): add test for #4274

[Simon Marlow]

Sun Sep 26 08:13:24 PDT 2010  Simon Marlow <marlowsd at gmail.com>
  * add test for #4274

    M ./tests/ghc-regress/rts/Makefile +3
    M ./tests/ghc-regress/rts/all.T +6
    A ./tests/ghc-regress/rts/exec_signals.hs
    A ./tests/ghc-regress/rts/exec_signals_child.c
    A ./tests/ghc-regress/rts/exec_signals_prepare.c

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=testsuite;a=darcs_commitdiff;h=20100926151324-12142-f08e68f7e5882bf8c9ee73cf7aa5f8620ca6fff5.gz