[infer][nullsafe] move all the Nullsafe related files in the same directory

Summary: Moving all the files related to nullable type checking under the same directory. The goal is to merge everything into the same backend based on the AI framework and access expressions.

Reviewed By: ngorogiannis

Differential Revision: D13350880

fbshipit-source-id: 8ab3cf81b

infer/src/deadcode/Makefile

@@ -45,7 +45,7 @@ depend:
 	cd .. && \
 	ocamldep -native \
 	  -I IR -I absint -I atd -I backend -I base -I biabduction -I bufferoverrun -I checkers \
-	  -I clang -I concurrency -I eradicate -I facebook -I integration -I istd \
+	  -I clang -I concurrency -I nullsafe -I facebook -I integration -I istd \
 	  -I java -I labs -I quandary -I unit -I unit/clang -I deadcode \
 	   $(ml_src_files) > deadcode/.depend
 

infer/src/dune.in

@@ -19,7 +19,7 @@ let source_dirs =
        ; "bufferoverrun"
        ; "checkers"
        ; "concurrency"
-       ; "eradicate"
+       ; "nullsafe"
        ; "integration"
        ; "labs"
        ; "quandary"