rosenthal: hugo-bin: Reference libraries from inputs.

See (guix build-system copy), `copy-build' only passes native-inputs
to #:inputs...

* rosenthal/packages/binaries.scm (hugo-bin)[#:phases]<patch-elf>: Use
`this-package-input' instead of `search-input-file'.

rosenthal/packages/binaries.scm

@@ -130,11 +130,13 @@ different needs.")
                  (lambda* (#:key inputs #:allow-other-keys)
                    (let ((hugo (string-append #$output "/bin/hugo")))
                      (invoke "patchelf" "--set-interpreter"
-                             (search-input-file inputs #$(glibc-dynamic-linker))
+                             (string-append #$(this-package-input "glibc")
+                                            #$(glibc-dynamic-linker))
                              hugo)
                      (invoke "patchelf" "--set-rpath"
-                             (dirname (search-input-file
+                             (string-append (ungexp (this-package-input "gcc")
-                                       inputs "/lib/libgcc_s.so.1"))
+                                                    "lib")
+                                            "/lib")
                              hugo)))))))
     (supported-systems '("x86_64-linux"))
     (native-inputs (list patchelf))