[cmake] Bump minimum version to 3.4.3

The Swift README states that the minimum CMake version required to build the
Swift project is the same as LLVM's: 3.4.3. Bump the minimum version
used by CMake to correspond to the README.

Author: modocache

CMakeLists.txt

@@ -1,18 +1,4 @@
-cmake_minimum_required(VERSION 2.8.12)
-
-if(POLICY CMP0051)
-  cmake_policy(SET CMP0051 NEW)
-endif()
-
-if(POLICY CMP0054)
-  cmake_policy(SET CMP0054 NEW)
-endif()
-
-# Enable the IN_LIST operator, as in:
-# `if(<element_variable> IN_LIST <list_variable>)`
-if(POLICY CMP0057)
-  cmake_policy(SET CMP0057 NEW)
-endif()
+cmake_minimum_required(VERSION 3.4.3)
 
 # Add path for custom CMake modules.
 list(APPEND CMAKE_MODULE_PATH

tools/swift-remoteast-test/CMakeLists.txt

@@ -6,6 +6,7 @@ add_swift_host_tool(swift-remoteast-test
   SWIFT_COMPONENT tools
 )
 
+set_target_properties(swift-remoteast-test PROPERTIES ENABLE_EXPORTS 1)
 target_link_libraries(swift-remoteast-test edit)
 
 # If building as part of clang, make sure the headers are installed.