Don't ignore .o.* files generated by infer -fd -- clang

Summary:
public
These files are not supposed to be kept around - while it's convenient to not see them,
they are polluting infer directory and hard to get rid of.

Reviewed By: martinoluca

Differential Revision: D2895610

fb-gh-sync-id: c12a333

.gitignore

@@ -55,10 +55,6 @@ org.eclipse.core.resources.prefs
 .DS_Store
 
 # Directories and files generated by Infer
-*.o.astlog
-*.o.sh
-*.o.bdump
-*.o.biniou
 infer-sources.tar.gz
 infer-osx-*.tar.xz
 infer-linux64-*.tar.xz