Avoid adding redundant temporary RUNPATH to builder's stdlib

Many shared libs and executables are only run after stdlib/runtime are
built. They don't need to link with builders stdlib at all.

tools/swift-def-to-strings-converter/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_swift_host_tool(swift-def-to-strings-converter
   swift-def-to-strings-converter.cpp
   SWIFT_COMPONENT tools
+  REQUIRED_FOR_MINIMAL_COMPILER
 )
 
 target_link_libraries(swift-def-to-strings-converter PRIVATE