Greatly increased GDB memory and CPU usage with newest embedded ARM toolchain

[R. Diez]

> [...]
> Yeah... peaked out over 5GB of memory usage, and:
 > [...]


For future reference, I have created a bug for this issue:

   Excessive CPU load and memory usage with -g3 debug info

   https://sourceware.org/bugzilla/show_bug.cgi?id=27754

Best regards,
   rdiez