build: stage libdispatch movement

In order to support libdispatch tests on Windows, the libraries must be
colocated with the tests.  This requires adjusting the build tree
layout.  Account for that layout structure.

Author: compnerd

CMakeLists.txt

@@ -88,7 +88,7 @@ set(libdispatch_cflags -I;${FOUNDATION_PATH_TO_LIBDISPATCH_SOURCE};-I;${FOUNDATI
 set(libdispatch_ldflags -L;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD};-L;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src;-ldispatch;-lswiftDispatch)
 if(CMAKE_SYSTEM_NAME STREQUAL Linux OR CMAKE_SYSTEM_NAME STREQUAL Android OR CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
   file(TO_CMAKE_PATH "${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}" FOUNDATION_PATH_TO_LIBDISPATCH_BUILD)
-  list(APPEND libdispatch_ldflags -Xlinker;-rpath;-Xlinker;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src)
+  list(APPEND libdispatch_ldflags -Xlinker;-rpath;-Xlinker;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD};-Xlinker;-rpath;-Xlinker;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src)
 endif()
 
 set(plutil_rpath)