Our development workflow tooling prevents trailing blank lines
from being added, but some such lines remain from before that
was enforced. Remove them to make it easier to rename files
without triggering enforcement.
This placeholder was added to the compilation rules for other languages
by commit v3.4.0-rc1~342^2 (Factor an <INCLUDES> placeholder out of
<FLAGS> in rule variables, 2015-07-13) but ASM was incorrectly left out.
Signed-off-by: Gregor Jasny <gjasny@googlemail.com>