Enable debugging in debug build (#38205)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/38205

Enable the preprocessor flag to allow debugging when in a debug build. This flag influences the Hermes headers included in the inspector, and causes them to include the debugging functionality.

Changelog:
    [General][Fixed] - Re-enabled debugging for debug builds

Reviewed By: lunaleaps, cortinico

Differential Revision: D47243235

fbshipit-source-id: 7982c69ab554335a9ad985394e4416ed69831137

packages/react-native/ReactCommon/hermes/inspector/CMakeLists.txt

@@ -20,6 +20,14 @@ target_compile_options(
         -fexceptions
 )
 
+if(${CMAKE_BUILD_TYPE} MATCHES Debug)
+        target_compile_options(
+                hermes_inspector
+                PRIVATE
+                -DHERMES_ENABLE_DEBUGGER=1
+        )
+endif()
+
 target_include_directories(hermes_inspector PUBLIC ${REACT_COMMON_DIR})
 target_link_libraries(hermes_inspector
         jsinspector