build: add a DT_RUNPATH entry for swiftDispatch

Adjust the embedded DT_RUNPATH to ensure that we find swiftDispatch at runtime.

Author: compnerd

CMakeLists.txt

@@ -59,6 +59,9 @@ if(FOUNDATION_ENABLE_LIBDISPATCH)
   set(deployment_enable_libdispatch -DDEPLOYMENT_ENABLE_LIBDISPATCH)
   set(libdispatch_cflags -I;${FOUNDATION_PATH_TO_LIBDISPATCH_SOURCE};-I;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src/swift;-Xcc;-fblocks)
   set(libdispatch_ldflags -L;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD};-L;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src;-ldispatch)
+  if(CMAKE_SYSTEM_NAME STREQUAL Linux OR CMAKE_SYSTEM_NAME STREQUAL Android OR CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
+    list(APPEND libdispatch_ldflags -Xlinker;-rpath;-Xlinker;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src)
+  endif()
 endif()
 
 add_swift_library(Foundation