openjdk7 fails to build openjdk7 (on 10.0)

[Huang Wen Hui]

Hi,
Compiling openjdk7 with openjdk7 on my on old DELL pc always wroks,
but I got the same problem on my iMac(2013) under FreeBSD 10.
if restrict to one cpu using cpuset, compiling is also ok on my iMac.
#cd /usr/ports/java/openjdk7 && cpuset -c -l 0 make

--hwh