Reland: Remove empty newline in build.prop

Before:
cat build.prop

\# begin common build properties
\# autogenerated by build/make/tools/buildinfo_common.sh

After
cat build.prop
\# begin common build properties
\# autogenerated by build/make/tools/buildinfo_common.sh

Change-Id: I8365bb59ad22a3bd9fc1dc904ff2026ddd7abe06
Test: m