Steps to reproduce:

1. Create a Build Profile. 
2. Build the profile with CLI absolute path: 

{code:java}
-activeBuildProfile <C:\Users\...\Assets>{code}

1. Notice the builds fails with error: 

{code:java}
Failed to create a valid asset guid for the specified build profile{code}

Actual results: Build failed to create a valid asset guid.

Expected results: All other unity command line args accept absolute paths. We should allow both absolute and relative path.

Reproducible with versions: 6000.0.48f1, 6000.2.0a11

Notes:

• Building from commandLine error getting: &quot;Failed to create a valid asset guid for the specified build profile&quot;