Build: Fix net45 exe signing.
Build: Fix net45 exe signing.

julianpaulozzi/katanaproject,HongJunRen/katanaproject,julianpaulozzi/katanaproject,eocampo/KatanaProject301,eocampo/KatanaProject301,evicertia/Katana,evicertia/Katana,abrodersen/katana,HongJunRen/katanaproject,PxAndy/Katana,abrodersen/katana,eocampo/KatanaProject301,eocampo/KatanaProject301,julianpaulozzi/katanaproject,PxAndy/Katana,evicertia/Katana,HongJunRen/katanaproject,evicertia/Katana,HongJunRen/katanaproject,tomi85/Microsoft.Owin,abrodersen/katana,julianpaulozzi/katanaproject,abrodersen/katana,HongJunRen/katanaproject,evicertia/Katana,tomi85/Microsoft.Owin,abrodersen/katana,eocampo/KatanaProject301,PxAndy/Katana,abrodersen/katana,tomi85/Microsoft.Owin,PxAndy/Katana,eocampo/KatanaProject301,julianpaulozzi/katanaproject,tomi85/Microsoft.Owin,evicertia/Katana,HongJunRen/katanaproject,julianpaulozzi/katanaproject