[Bug sanitizer/55617] static constructors are not being instrumented correctly on darwin

[howarth at nitro dot med.uc.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55617

--- Comment #24 from Jack Howarth <howarth at nitro dot med.uc.edu> 2013-01-31 22:22:50 UTC ---
Suspect we need to use...

ctors[ctor_index].symbol = copy_rtx(symbol);

in machopic_asm_out_constructor although I am unclear on what need need to do
to release the memory for this copy in at the end of finalize_ctors.