fs: binfmt: add missing MODULE_DESCRIPTION() macros

Fix the 'make W=1' warnings:
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/binfmt_misc.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/binfmt_script.o

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240527-md-fs-binfmt-v1-1-f9dc1745cb67@quicinc.com


Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <brauner@kernel.org>