ports/multimedia/mkvtoolnix/patches/patch-Rakefile

`configure' defines LLVM_LLD, that can only be overridden with another path.
Ensure that the default and working linker is used on all clang archs.

Index: Rakefile
--- Rakefile.orig
+++ Rakefile
@@ -180,7 +180,6 @@ def setup_globals
   ldflags                  = ""
   ldflags                 += determine_stack_protector_flags
   ldflags                 += " -pg"                                     if c?(:USE_PROFILING)
-  ldflags                 += " -fuse-ld=lld"                            if is_clang? && !c(:LLVM_LLD).empty? && !$building_for[:macos]
   ldflags                 += " -Llib/libebml/src -Llib/libmatroska/src" if c?(:EBML_MATROSKA_INTERNAL)
   ldflags                 += " -Llib/fmt/src"                           if c?(:FMT_INTERNAL)
   ldflags                 += " #{c(:EXTRA_LDFLAGS)} #{c(:USER_LDFLAGS)} #{c(:LDFLAGS_RPATHS)} #{c(:BOOST_LDFLAGS)}"
@@ -1122,10 +1121,8 @@ $common_libs = [
   :intl,
   :iconv,
   :fmt,
-  :stdcppfs,
   :qt_non_gui,
   :gmp,
-  "-lstdc++",
 ]
 
 $common_libs += [:cmark]   if c?(:BUILD_GUI)