[Compiler] EABI compilation mode

Dear Shekib,

Not all libraries could be delivered in EABI format. C-GPS is one of them.
C-GPS library will remain in Elf format within the Open AT Framework 2.3x.

For new projects, it is currently recommended to use XM0110 GPS module with its Location library.
Location library is available in EABI format.

Christophe