Fix headers search paths for nlohmann json in Core ML. (#3607)

Summary:
Pull Request resolved: #3607

.

Reviewed By: kirklandsign

Differential Revision: D57348926

fbshipit-source-id: f867150138f2b8162ea51de245a980606022f018

Author: shoumikhin

backends/apple/coreml/runtime/inmemoryfs/setup.py

@@ -30,7 +30,7 @@
         cxx_std=cxx_std,
         extra_compile_args=["-mmacosx-version-min=10.15", "-g"],
         include_dirs=[
-            "../../third-party/nlohmann_json/single_include/nlohmann",
+            "../../third-party/nlohmann_json/single_include",
             ".",
             "../util",
         ],

backends/apple/coreml/runtime/workspace/executorchcoreml.xcodeproj/project.pbxproj

@@ -900,7 +900,7 @@
 					"$(SRCROOT)/../include",
 					"$(SRCROOT)/../sdk",
 					"$(SRCROOT)/../util",
-					"$(SRCROOT)/../../third-party/nlohmann_json/single_include/nlohmann",
+					"$(SRCROOT)/../../third-party/nlohmann_json/single_include",
 					"$(SRCROOT)/../../third-party/coremltools/deps/protobuf/src",
 				);
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
@@ -931,7 +931,7 @@
 					"$(SRCROOT)/../include",
 					"$(SRCROOT)/../sdk",
 					"$(SRCROOT)/../util",
-					"$(SRCROOT)/../../third-party/nlohmann_json/single_include/nlohmann",
+					"$(SRCROOT)/../../third-party/nlohmann_json/single_include",
 					"$(SRCROOT)/../../third-party/coremltools/deps/protobuf/src",
 				);
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;