build: use the new libedit imported library

Use the imported library to track header search path and library search
paths and dependencies rather than replicating that knowledge.

Author: compnerd

lib/Immediate/CMakeLists.txt

@@ -16,5 +16,5 @@ if(LibEdit_FOUND AND LibEdit_HAS_UNICODE)
   target_compile_definitions(swiftImmediate PRIVATE
     HAVE_LIBEDIT)
   target_link_libraries(swiftImmediate PRIVATE
-    ${LibEdit_LIBRARIES})
+    libedit)
 endif()

tools/SourceKit/tools/sourcekitd-repl/CMakeLists.txt

@@ -12,10 +12,8 @@ if(NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
     dispatch
     BlocksRuntime)
 endif()
-target_include_directories(sourcekitd-repl PRIVATE
-  ${LibEdit_INCLUDE_DIRS})
 target_link_libraries(sourcekitd-repl PRIVATE
-  ${LibEdit_LIBRARIES})
+  libedit)
 
 if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
   set_target_properties(sourcekitd-repl