hurd: Fix dlopening libraries from static programs

dlopening libraries from a static program would dlopen libc.so,
which thus needs its own initialization, done in posixland_init,
which was missing initializing RPCs so far.

ChangeLog:

2014-11-23  Samuel Thibault  <samuel.thibault@ens-lyon.org>

	* sysdeps/mach/hurd/i386/init-first.c (posixland_init): Call
	__mach_init in dlopened libc.

ChangeLog

@@ -1,3 +1,8 @@
+2014-11-23  Samuel Thibault  <samuel.thibault@ens-lyon.org>
+
+	* sysdeps/mach/hurd/i386/init-first.c (posixland_init): Call
+	__mach_init in dlopened libc.
+
 2014-11-22  Mike Frysinger  <vapier@gentoo.org>
 
 	* sysdeps/arm/preconfigure.ac: Delete EABI check.

sysdeps/mach/hurd/i386/init-first.c

@@ -72,6 +72,11 @@ posixland_init (int argc, char **argv, char **envp)
       /* Set the FPU control word to the proper default value.  */
       __setfpucw (__fpu_control);
     }
+  else
+    {
+      /* Initialize data structures so the additional libc can do RPCs.  */
+      __mach_init ();
+    }
 
   /* Save the command-line arguments.  */
   __libc_argc = argc;