Adding build support for Incremental DOM to use the Soy Integration tests.
Adding build support for Incremental DOM to use the Soy Integration tests.

- Adding target to build a single trivial test from the Soy Integration tests. Tests will be added to the whitelist as they become supported by the Incremental DOM code generation.
- Adding support for globals to Incremental DOM code gen.
- Fix  build target's main class for SoyToIncrementalDomSrcCompilerForGoogle
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=104510166

Medium/closure-templates,google/closure-templates,rpatil26/closure-templates,rgpower/closure-templates,rgpower/closure-templates,Medium/closure-templates,yext/closure-templates,rpatil26/closure-templates,nathancomstock/closure-templates,rpatil26/closure-templates,google/closure-templates,yext/closure-templates,google/closure-templates,rgpower/closure-templates,Medium/closure-templates,google/closure-templates,Medium/closure-templates,nathancomstock/closure-templates,nathancomstock/closure-templates,rpatil26/closure-templates,rgpower/closure-templates,nathancomstock/closure-templates,yext/closure-templates,Medium/closure-templates,yext/closure-templates,google/closure-templates