Fix memory leak in ppc64 stackwalker

BUG=757166

Change-Id: I967a6903332b9c3d16b583f7fa4d3c9c44c2f729
Reviewed-on: https://chromium-review.googlesource.com/643267
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
Cr-Mirrored-From: https://chromium.googlesource.com/breakpad/breakpad
Cr-Mirrored-Commit: c4335f04356afe67cabc4cf5eb3d1f16294c3a03
1 file changed