quagga: Remove WEAK_ALIAS pragma usage

quagga: Remove WEAK_ALIAS pragma usage

The code was using pragma's to override function calls
while there was code for platforms that don't support pragma's
Just remove the pragma usage from the program in it's entirety

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Reviewed-by: Don Slice <dslice@cumulusnetworks.com>
Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com>