build: support bootstrapped build on FreeBSD

Fixes failures to link and run the bootstrapping1 compiler.

Author: mhjacobson

cmake/modules/AddSwift.cmake

@@ -527,7 +527,7 @@ function(_add_swift_runtime_link_flags target relpath_to_lib_dir bootstrapping)
     set_property(TARGET ${target} APPEND_STRING PROPERTY
                  LINK_FLAGS " -lobjc ")
 
-  elseif(SWIFT_HOST_VARIANT_SDK MATCHES "LINUX|ANDROID|OPENBSD")
+  elseif(SWIFT_HOST_VARIANT_SDK MATCHES "LINUX|ANDROID|OPENBSD|FREEBSD")
     set(swiftrt "swiftImageRegistrationObject${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_OBJECT_FORMAT}-${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}-${SWIFT_HOST_VARIANT_ARCH}")
     if(${ASRLF_BOOTSTRAPPING_MODE} MATCHES "HOSTTOOLS|CROSSCOMPILE")
       # At build time and run time, link against the swift libraries in the

stdlib/cmake/modules/SwiftSource.cmake

@@ -787,7 +787,7 @@ function(_compile_swift_files
       # stdlib in the current stage is not built yet.
       if(${SWIFT_HOST_VARIANT_SDK} IN_LIST SWIFT_APPLE_PLATFORMS)
         set(set_environment_args "${CMAKE_COMMAND}" "-E" "env" "DYLD_LIBRARY_PATH=${bs_lib_dir}")
-      elseif(SWIFT_HOST_VARIANT_SDK MATCHES "LINUX|ANDROID|OPENBSD")
+      elseif(SWIFT_HOST_VARIANT_SDK MATCHES "LINUX|ANDROID|OPENBSD|FREEBSD")
         set(set_environment_args "${CMAKE_COMMAND}" "-E" "env" "LD_LIBRARY_PATH=${bs_lib_dir}")
       endif()
     endif()