Fixes missing icons-2x.png in build.xml

icons@2x.png was not renamed in build.xml, resulting in no icons-2x.png
file being copied to the release folder and a blank toolbar on high-res
displays.
Merge commit 'd1a663b338e8a17942c7e09ffe2fba4edc3f16d8'
Changed line separator setting from CRLF to LF in build.xml.