Workloads sourcemaps inconsistent

[flashdesignory]

Currently not all workloads that use minified code expose sourcemaps.
Sourcemaps ensure that these workloads are easy to debug when running within Speedometer.
Therefore, we should audit all workloads and ensure build scripts and compilers output sourcemaps where possible.

@kara

[rniwa]

Adding angular source map in #332.

[rniwa]

Is this something we should track for v3.0?

[flashdesignory]

it's not a blocker, we can complete in V4 in my opinion.