package/firejail: mark as broken

The firejail package does not cross-compile at all, because it is not
using automake, but a hand-written Makefile.in. So it does not use the
cross-compiler found by ./configure.

But when we fix it by passing:
    FIREJAIL_MAKE_ENV = $(TARGET_CONFIGURE_OPTS)

it then fails to build with symbols redefinitions:

    /home/ymorin/dev/buildroot/O/host/usr/bin/arm-linux-gnueabihf-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  -ggdb  -O2 -DVERSION='"0.9.44.8"' -fstack-protector-all -D_FORTIFY_SOURCE=2 -fPIC -Wformat -Wformat-security  -c libtrace.c -o libtrace.o
    /tmpfs/cckgOLVz.s: Assembler messages:
    /tmpfs/cckgOLVz.s:1115: Error: symbol `stat64' is already defined
    /tmpfs/cckgOLVz.s:1282: Error: symbol `lstat64' is already defined
    /tmpfs/cckgOLVz.s:2296: Error: symbol `fopen64' is already defined
    /tmpfs/cckgOLVz.s:2631: Error: symbol `freopen64' is already defined
    Makefile:16: recipe for target 'libtrace.o' failed

(ditto for libtracelog)

Fixing this is not trivial, so we just mark the package as broken.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Chris Frederick <chrisf@cdf123.net>
[Thomas: also mark the Config.in comment as BROKEN.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>