Fix --format option for 'nm' (#338)
Fix --format option for 'nm' (#338)

llvm-nm doesn't seem to accept shorten form of --format arguments,
see below an error excerpt:
 arm-rdk-linux-gnueabi-llvm-nm: for the   --format option: Cannot find option named 'p'!

So, let's pass the full name of the option (which also works for binutils version of nm).

Signed-off-by: Damian Wrobel <20fa0554a0ef0aeb78c92bea028c18a68ec048a1@ertelnet.rybnik.pl>
flutter/buildroot,flutter/buildroot,flutter/buildroot,flutter/buildroot