Fix gas's 'macro count' test for various targets

gas/app.c

@@ -686,6 +686,11 @@ do_scrub_chars (size_t (*get) (char *, size_t), char *tostart, size_t tolen)
 	      PUT (quotechar);
 	      continue;
 
+	      /* These two are used inside macros.  */
+	    case '@':
+	    case '+':
+	      break;
+
 	    case '"':
 	    case '\\':
 	    case 'b':

gas/testsuite/gas/macros/count.s

@@ -1,19 +1,19 @@
 
-.macro mac1 count=10
+	.macro mac1 count
 	.print "\@"
 	.print "\+"
-.if \count > 1
+	.if \count > 1
 	mac1 \count-1
-.endif
-.endm
+	.endif
+	.endm
 
-.macro mac2 count=100
+	.macro mac2 count
 	.print "\@"
 	.print "\+"
-.if \count > 1
+	.if \count > 1
 	mac2 \count-1
-.endif
-.endm
+	.endif
+	.endm
 
-mac1 2
-mac2 3
+	mac1 2
+	mac2 3