arm: don't engage symver scrubber hack in CCS mode

In that mode the comment char is ; while @ has no special meaning.
Engaging the special logic in that case results in comments not being
respected on .symver lines.

gas/app.c

@@ -805,7 +805,9 @@ do_scrub_chars (size_t (*get) (char *, size_t), char *tostart, size_t tolen,
 	 in this function.  */
       if (symver_state == NULL)
 	{
-	  if ((state == 0 || state == 1) && ch == symver_pseudo[0])
+	  if ((state == 0 || state == 1)
+	      && strchr (tc_comment_chars, '@') != NULL
+	      && ch == symver_pseudo[0])
 	    symver_state = symver_pseudo + 1;
 	}
       else

gas/testsuite/gas/arm/ccs-symver.d

@@ -0,0 +1,10 @@
+#name: .symver in CCS mode
+#as: -mccs
+#readelf: -sW
+# This test is only valid on ELF based ports.
+#notarget: *-*-pe *-*-wince
+
+#...
+ +[0-9]+: +0+ +1 +OBJECT +GLOBAL +DEFAULT +[0-9]+ +foo
+ +[0-9]+: +0+ +1 +OBJECT +GLOBAL +DEFAULT +[0-9]+ +foo@version1
+#pass

gas/testsuite/gas/arm/ccs-symver.s

@@ -0,0 +1,7 @@
+	.data
+	.globl foo
+	.type foo,@object
+foo:
+	.byte 0
+	.size foo,.-foo
+	.symver foo,foo@version1;remove