Added semicolons for AssemblyGenerator to build when path to sources contain spaces

#### Purpose

Project `AssemblyInfoGenerator` fails during building.
![bat error](https://cloud.githubusercontent.com/assets/8158551/4714773/db426894-58f6-11e4-9335-55306bca2013.png)

The reason in that my path to cloned repository contains of spaces: `D:\Projects\Dynamo Library UI\git_orig`.

After changes solution is built successfully.
![bat success](https://cloud.githubusercontent.com/assets/8158551/4714870/dd04c23e-58f7-11e4-98c2-41d5e365c63b.PNG)

#### Modifications

Added semicolons to correct places.

#### Additional references

[MAGN-5135](http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-5135).

#### References

As I understand by closed PR @theanh0512 made tasks connected with AssemblyInfoGenerator. Could you please take a look? @sharadkjaiswal, please take a look.
@theanh0512, removing that double quotes makes an error.
![image](https://cloud.githubusercontent.com/assets/8158551/4897019/122fc458-6402-11e4-88d3-d971a9f8b28e.png)

Tested on latest master. Could you handle double quotes?