Change project location for Merp.EntityFramework.MigrationSupport

[kaizenberg]

The relative location of the Migration Support project needs to match other projects. Right now its path comes out of the current working directory of the solution and looks for the Mastreeno folder which will not exist after a fresh "git clone".

Actual:
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Merp.EntityFramework.MigrationSupport", "..\Mastreeno\src\Merp.EntityFramework.MigrationSupport\Merp.EntityFramework.MigrationSupport.csproj", "{44313FA6-8E47-4166-8ABD-D8E85BFDA471}"
EndProject

Expected:
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Merp.EntityFramework.MigrationSupport", "\src\Merp.EntityFramework.MigrationSupport\Merp.EntityFramework.MigrationSupport.csproj", "{44313FA6-8E47-4166-8ABD-D8E85BFDA471}"
EndProject