[cmake] Add executable suffix to test deps

Windows tests were depending on bin\readelf instead of bin\readelf.exe
causing ninja to fail the build.

Author: gmittert

test/CMakeLists.txt

@@ -87,7 +87,7 @@ function(get_test_dependencies SDK result_var_name)
     list(APPEND deps ${deps_binaries})
   else()
     foreach(binary ${deps_binaries})
-      list(APPEND deps "${SWIFT_NATIVE_SWIFT_TOOLS_PATH}/${binary}")
+      list(APPEND deps "${SWIFT_NATIVE_SWIFT_TOOLS_PATH}/${binary}${CMAKE_EXECUTABLE_SUFFIX}")
     endforeach()
   endif()