[poky] strange libgcc build failure in autobuilder

[Cui, Dexuan]

I saw some libgcc(the new recipe I added days ago) failure that I can't reproduce locally.
e.g.,  "qemux86 poky-image-sdk failed": http://autobuilder.pokylinux.org:8010/builders/nightly-internal-incremental/builds/16/steps/shell_5/logs/stdio

libgcc's do_package failed:
ERROR: Error executing a python function in /builds2/pokybuilds/nightly-internal/build/meta/recipes-devtools/gcc/libgcc_4.5.1.bb:
IOError: [Errno 2] No such file or directory: '/builds2/pokybuilds/nightly-internal/build/build/tmp/sysroots/i586-poky-linux/shlibs/cairo-perf-utils.list'

It's odd -- why cario-perf-utils.list is involved...

Thanks,
-- Dexuan