linux/fs.h: move member alignment check next to definition of struct filename

linux/fs.h: move member alignment check next to definition of struct filename

Instead of doing this compile-time check in some slightly arbitrary user
of struct filename, put it next to the definition.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Rasmus Villemoes <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Luc Van Oostenryck <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>