build: Compile: Remove the -c flag from flags

The -c flag was great, but in order to have compatibility with more
compilers (or assemblers such as nasm) it has to be manually specified
in the flags in the build files.

Signed-off-by: Bart Kuivenhoven <bemkuivenhoven@gmail.com>
build: command: Make stderr stream visible

Signed-off-by: Bart Kuivenhoven <bemkuivenhoven@gmail.com>