Update system_project.tcl scripts to correctly select the necessary constraint files
ad6676evb, fmcadc2, fmcadc4, fmcadc5, fmcjesdadc1: Remove unused set_proprieties
Add .gitattributes file which sets up the eol encoding handling. This will make sure that we get a uniform eol encoding across different operating systems. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>