Run buildifier

Add blank line as insisted upon by buildifier. This splits up a block of
related variables, disassociating one from its corresponding comment,
but there is no currently known way to stop this, and we need to be
buildifier-clean in order to switch on enforcing of style correctness as
judged by buildifier.

See also bazelbuild/buildtools#108.

Author: mwoehlke-kitware

tools/lcm.BUILD

@@ -219,6 +219,7 @@ install_files(
 # TODO(jamiesnape): Find an alternative to the requirement that a license file
 # must be passed to every single use of the install rule.
 DOC_DEST = "share/doc/lcm"
+
 LICENSE_DOCS = ["COPYING"]
 
 install(