1014 - Variable name is too long. (Length: %u, MaxLength: %u)

Description
A variable with a name greater than 64 characters was encountered. 64 characters is imposed as a sanity check limit for variable names.
Example
Config:
.MyVarWhoseNameIsFarTooLongAndBecauseOfThisWillCauseFASTBuildToOutputAnError = 'value'
Output:
c:\Test\fbuild.bff(1):(77) FASTBuild Error #1014 - Variable name is too long. (Length: 76, MaxLength: 64) .MyVarWhoseNameIsFarTooLongAndBecauseOfThisWillCauseFASTBuildToOutputAnError = 'value' ^ \--here
Fix:
.MyShortVarName = 'value'