debuginfo: Try to get minimal version of LLDB autotest framework running without crash with old LLDB version: Enable rpath by default

Author: michaelwoerister

configure

@@ -418,7 +418,7 @@ opt ccache 0 "invoke gcc/clang via ccache to reuse object files between builds"
 opt local-rust 0 "use an installed rustc rather than downloading a snapshot"
 opt inject-std-version 1 "inject the current compiler version of libstd into programs"
 opt llvm-static-stdcpp 0 "statically link to libstdc++ for LLVM"
-opt rpath 0 "build rpaths into rustc itself"
+opt rpath 1 "build rpaths into rustc itself"
 opt nightly 0 "build nightly packages"
 opt verify-install 1 "verify installed binaries work"
 opt jemalloc 1 "build liballoc with jemalloc"