Revert "-Wno-attributes for alloc_controller"

This reverts commit 7c2fa946a42dd71a88cc6a4deecd2fae3eb3d902.
Revert "libcopybit: fix for narrowing conversion in C++11."

This reverts commit 4ad4a1cd020a2d9588a6036110b5e26d2b732483.
Revert "libqdutils: Use -Wno-attributes"

This reverts commit abd59227c6ff507265faf6ce7a21da56cc651f9a.