[NUCLEO_L053R8] Add this platform in workspace_tools files
[NUCLEO_L053R8] Add cmsis files
[NUCLEO_L053RB] Add cmsis files (2)
[NUCLEO_L053RB] Add cmsis files (3)
[NUCLEO_L053RB] Add cmsis files (4)
[NUCLEO_L053R8] Add cmsis files (5)
[NUCLEO_L053R8] Add hal files
Merge pull request #292 from bcostm/master

[NUCLEO_L053R8] Add this platform