[LLVM-C] Add Missing 'break's in InlineAsm bindings

Summary: Noticed by Andrea Di Biagio while reviewing r329369

Reviewers: whitequark, harlanhaskins

Reviewed By: harlanhaskins

Subscribers: llvm-commits, abergmeier-dsfishlabs

Differential Revision: https://reviews.llvm.org/D45496

llvm-svn: 329731