#1 Add missing id tags to profiles in Maven pom.xml file

[Michael Hinterseher]

Each profile shall have an unique id.
Unfortunately the id tags are missing in mig layout pom.xml file.
This causes warnings if projects using mig layout:
[WARNING] Overriding profile: 'null' (source: pom) with new instance from source: pom
[WARNING] Overriding profile: 'null' (source: pom) with new instance from source: pom
[WARNING] Overriding profile: 'null' (source: pom) with new instance from source: pom

For each of the four profiles add an id e.g.:
<profile>
<id>windows_x86</id>
<activation>
...