Reflection: conditionally build the target library

There is a build of the reflection library for the tools which we want to build
if we are building the tools.  The target library should only be built if we are
building the standard library.

Author: compnerd

stdlib/public/Reflection/CMakeLists.txt

@@ -19,11 +19,13 @@ if (LLVM_ENABLE_ASSERTIONS)
     "${SWIFT_SOURCE_DIR}/lib/Demangling/NodeDumper.cpp")
 endif(LLVM_ENABLE_ASSERTIONS)
 
-add_swift_target_library(swiftReflection STATIC TARGET_LIBRARY
-  ${swiftReflection_SOURCES}
-  C_COMPILE_FLAGS ${SWIFT_RUNTIME_CXX_FLAGS}
-  LINK_FLAGS ${SWIFT_RUNTIME_LINK_FLAGS}
-  INSTALL_IN_COMPONENT dev)
+if(SWIFT_BUILD_STDLIB)
+  add_swift_target_library(swiftReflection STATIC TARGET_LIBRARY
+    ${swiftReflection_SOURCES}
+    C_COMPILE_FLAGS ${SWIFT_RUNTIME_CXX_FLAGS}
+    LINK_FLAGS ${SWIFT_RUNTIME_LINK_FLAGS}
+    INSTALL_IN_COMPONENT dev)
+endif()
 
 # Build a specific version for the host with the host toolchain.  This is going
 # to be used by tools (e.g. lldb)