Tests: Fix CustComDepend test for Ninja Multi-Config

Tests/CustComDepend/CMakeLists.txt

@@ -6,9 +6,9 @@ set(EXECUTABLE_OUTPUT_PATH ${CustComDepend_BINARY_DIR}/bin)
 add_executable(foo foo.cxx)
 add_custom_command(
   OUTPUT ${CustComDepend_BINARY_DIR}/bar.c
-  COMMAND ${CustComDepend_BINARY_DIR}/bin/${CMAKE_CFG_INTDIR}/foo
+  COMMAND $<TARGET_FILE:foo>
   ${CustComDepend_BINARY_DIR}/bar.c
-  DEPENDS ${CustComDepend_BINARY_DIR}/bin/${CMAKE_CFG_INTDIR}/foo
+  DEPENDS $<TARGET_FILE:foo>
 )
 
 add_library(bar SHARED ${CustComDepend_BINARY_DIR}/bar.c)