[Darwin] Fix a couple of Wformat-diag build warnings.

2019-06-28  Iain Sandoe  <iain@sandoe.co.uk>

	* config/darwin-c.c (pop_field_alignment): Quote #pragma options.
	* config/darwin-driver.c (darwin_default_min_version): Remove newline
	from warning.
	(darwin_driver_init): Likewise.

From-SVN: r272789

gcc/ChangeLog

+2019-06-28  Iain Sandoe  <iain@sandoe.co.uk>
+
+	* config/darwin-c.c (pop_field_alignment): Quote #pragma options.
+	* config/darwin-driver.c (darwin_default_min_version): Remove newline
+	from warning.
+	(darwin_driver_init): Likewise.
+
 2019-06-28  Jan Beulich  <jbeulich@suse.com>
 
 	* config/i386/sse.md (vgf2p8affineinvqb_<mode><mask_name>,

gcc/config/darwin-c.c

@@ -79,7 +79,7 @@ pop_field_alignment (void)
       free (entry);
     }
   else
-    error ("too many #pragma options align=reset");
+    error ("too many %<#pragma options%> align=reset");
 }
 
 /* Handlers for Darwin-specific pragmas.  */

gcc/config/darwin-driver.c

@@ -202,7 +202,7 @@ darwin_default_min_version (void)
       const char *checked = validate_macosx_version_min (new_flag);
       if (checked == NULL)
 	{
-	  warning (0, "couldn%'t understand version %s\n", new_flag);
+	  warning (0, "couldn%'t understand version %s", new_flag);
 	  return NULL;
 	}
       new_flag = xstrndup (checked, strlen (checked));
@@ -298,7 +298,7 @@ darwin_driver_init (unsigned int *decoded_options_count,
 	  vers_string =
 	    validate_macosx_version_min ((*decoded_options)[i].arg);
 	  if (vers_string == NULL)
-	    warning (0, "%qs is not valid for %<mmacosx-version-min%>\n",
+	    warning (0, "%qs is not valid for %<mmacosx-version-min%>",
 		     (*decoded_options)[i].arg);
 	  else if (vers_string == (*decoded_options)[i].arg)
 	    vers_string = xstrndup ((*decoded_options)[i].arg, 32);