attribute pb to be binary and re-commit the non-corrupted tombstone.pb

Author: supervacuus

.gitattributes

@@ -1,6 +1,7 @@
 * text eol=lf
 *.png binary
 *.jpg binary
+*.pb binary
 
 # These are explicitly windows files and should use crlf
 *.bat           text eol=crlf