fuzzer/*: normalize src/ includes

this uses the format introduced to some files in:
cc3577e9 fuzzer/*: use src/ based include paths

Change-Id: I9b5cbeadbb9d54d1e89f474a6e479a5eb3175ed7
(cherry picked from commit c5bc36243ab5dc4351fb5de5f7047cf621114143)
5 files changed