compilers/d: fix mangling of rpath-link in DMD-like compilers

We didn't consider that it has arguments following it, so the resulting
compiler command line ended up with stuff like:

-L=-rpath-link -L=-L=/path/to/directory -L=more-args

and the directory for rpath-link got eaten up as a regular -L path to
the compiler rather than being passed as -Xlinker to the linker.

Then the -rpath-link would consume the next -Xlinker argument, end up
with the wrong rpath-link (may or may not cause link errors) and then
disappear arguments we need.

As an example failure mode, if the next argument is -soname this treats
the soname text as an input file, which probably does not exist if it
was generated in a subdirectory, and also because it can never be
successfully built in the first place -- though if it did, it would link
to itself which is very wrong.

mesonbuild/compilers/d.py

@@ -286,7 +286,7 @@ class DmdLikeCompilerMixin(CompilerMixinBase):
         # see the comment in the "-L" section
         link_expect_arg = False
         link_flags_with_arg = [
-            '-rpath', '-soname', '-compatibility_version', '-current_version',
+            '-rpath', '-rpath-link', '-soname', '-compatibility_version', '-current_version',
         ]
         for arg in args:
             # Translate OS specific arguments first.