Replace one use of check with checkLazy.
Replace one use of check with checkLazy.

Reduce total allocation when linking clang from 320.04MB to 300.82MB.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@319924 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld