gnu: rust-libloading-0.5: Don't hide package.

* gnu/packages/crates-io.scm (rust-libloading-0.5)[arguments]: Skip
build. Add rust-winapi-0.3 to cargo-inputs. Add rust-cc-1.0 to
cargo-development-inputs.
[properties]: Remove field.

gnu/packages/crates-io.scm

@@ -5048,6 +5048,12 @@ values of all the exported APIs match the platform that libc is compiled for.")
          (base32
           "0lyply8rcqc8agajzxs7bq6ivba9dnn1i68kgb9z2flnfjh13cgj"))))
     (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-winapi" ,rust-winapi-0.3))
+       #:cargo-development-inputs
+       (("rust-cc" ,rust-cc-1.0))))
     (home-page "https://github.com/nagisa/rust_libloading/")
     (synopsis "Rust library for loading dynamic libraries")
     (description
@@ -5056,7 +5062,6 @@ The most important safety guarantee by this library is prevention of
 dangling-Symbols that may occur after a Library is unloaded.  Using this library
 allows loading dynamic libraries (also known as shared libraries) as well as use
 functions and static variables these libraries contain.")
-    (properties '((hidden? . #t)))
     (license license:isc)))
 
 (define-public rust-libssh2-sys-0.2