Don't adjust line endings for .mod and .o files

(cherry picked from commit b640130)

Author: zbeekman

.gitattributes

@@ -11,6 +11,8 @@
 *.txt text
 
 # Denote all files that are truly binary and should not be modified.
+*.mod binary
+*.o binary
 *.a binary
 *.tar binary
 *.gz binary