build: add an explicit link to BlocksRuntime

The SDK overlay requires the BlocksRuntime but did not explicitly link
to it.  This works on most platforms, however, Windows requires that all
symbols are fully resolved (effectively `-z defs` on Linux).  Add the
missing dependency.

Author: compnerd

src/CMakeLists.txt

@@ -118,6 +118,8 @@ if(ENABLE_SWIFT)
                       DispatchStubs
                     LINK_FLAGS
                       -lDispatchStubs
+                      -L $<TARGET_LINKER_FILE_DIR:BlocksRuntime>
+                      -lBlocksRuntime
                       -L $<TARGET_LINKER_FILE_DIR:dispatch>
                       -ldispatch
                     MODULE_NAME