As discussed on the list some time ago. cmake produces .po files already in
native line endings. Only autotools on mingw might produce wrong line endings
now, but I am pretty sure that nobody updates .po files using autotools on mingw.
# configure.ac needs to have unix line ends on windows, see #10053
configure.ac eol=lf
+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
+
+# Our .po file update scripts produce native line endings
+*.po text
+