Add gitattributes to control crlf conversion.

.gitattributes

@@ -0,0 +1,41 @@
+* text=auto
+
+*.adoc     text
+*.html     text
+*.in       text
+*.json     text
+*.md       text
+*.proto    text
+*.py       text
+*.rs       text
+*.service  text
+*.sh       text
+*.toml     text
+*.txt      text
+*.x        text
+*.yml      text
+
+*.raw    binary
+*.bin    binary
+*.png    binary
+*.jpg    binary
+*.jpeg   binary
+*.gif    binary
+*.ico    binary
+*.mov    binary
+*.mp4    binary
+*.mp3    binary
+*.flv    binary
+*.fla    binary
+*.swf    binary
+*.gz     binary
+*.zip    binary
+*.7z     binary
+*.ttf    binary
+*.eot    binary
+*.woff   binary
+*.pyc    binary
+*.pdf    binary
+*.ez     binary
+*.bz2    binary
+*.swp    binary