[Bug bootstrap/86630] gcc/graphite.c build failure on AIX 5.2 and 5.3

[bugzilla-gcc at thewrittenword dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86630

--- Comment #1 from The Written Word <bugzilla-gcc at thewrittenword dot com> 
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AIX 6.1 exhibits a similar error.