gnu: libpciaccess-static: Keep in same module as ‘libpciaccess’.

Fixes a bug introduced in beb9ad2cf7 where
‘guix pull’ would fail to build guix-system-tests.drv:

  gnu/packages/hurd.scm:317:13: error: libpciaccess: unbound variable

* gnu/packages/hurd.scm (libpciaccess-static): Move to…
* gnu/packages/xorg.scm (libpciaccess-static): … here.
Add ‘name’ field.

Change-Id: I4ec6a800360e82a5bc28f4e0b6c51772108fc3b1

gnu/packages/hurd.scm

@@ -311,17 +311,6 @@ Hurd-minimal package which are needed for both glibc and GCC.")
 (define %add-to-hurd-subdirs
   (list "libmachdevdde" "libddekit"))
 
-;;; A static libpciaccess is required by hurd and netdde.
-(define libpciaccess-static
-  (package
-    (inherit libpciaccess)
-    (arguments
-     (substitute-keyword-arguments (package-arguments libpciaccess)
-       ((#:configure-flags flags)
-        #~(cons "-Ddefault_library=static" #$flags))))
-    (propagated-inputs
-     (list zlib (list zlib "static")))))
-
 (define-public hurd
   (package
     (name "hurd")

gnu/packages/xorg.scm

@@ -1206,6 +1206,17 @@ themselves.")
     (description "Xorg Generic PCI access library.")
     (license license:x11)))
 
+;;; A static libpciaccess is required by hurd and netdde.
+(define-public libpciaccess-static
+  (package/inherit libpciaccess
+    (name "libpciaccess-static")
+    (arguments
+     (substitute-keyword-arguments (package-arguments libpciaccess)
+       ((#:configure-flags flags)
+        #~(cons "-Ddefault_library=static" #$flags))))
+    (propagated-inputs
+     (list zlib (list zlib "static")))))
+
 (define-public libpthread-stubs
   (package
     (name "libpthread-stubs")