Wrap the Compiler Env Assignation

[benoit-dubreuil]

Specifications

• Develop a script for each build target that foremost set the compiler's environment variables (WIP - REVIEW : Append the Compiler's Env to Current Shell #136).
• The script then wraps the shell functionalities as an interpreter in order to later call Meson.
• Place the script in the build/<build-target>/script directory (Create the build/<build-target>/script Directory #128).