[AArch64] Set jump-align=4 for neoversen1

Testing shows the setting of 32:16 for jump alignment has a significant
codesize cost, however it doesn't make a difference in performance.
So set jump-align to 4 to get 1.6% codesize improvement.

gcc/
	* config/aarch64/aarch64.c (neoversen1_tunings): Set jump_align to 4.

gcc/ChangeLog

+2020-01-20  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* config/aarch64/aarch64.c (neoversen1_tunings): Set jump_align to 4.
+
 2020-01-20  Andrew Pinski  <apinski@marvell.com>
 
 	PR middle-end/93242

gcc/config/aarch64/aarch64.c

@@ -1132,7 +1132,7 @@ static const struct tune_params neoversen1_tunings =
   3, /* issue_rate  */
   (AARCH64_FUSE_AES_AESMC | AARCH64_FUSE_CMP_BRANCH), /* fusible_ops  */
   "32:16",	/* function_align.  */
-  "32:16",	/* jump_align.  */
+  "4",		/* jump_align.  */
   "32:16",	/* loop_align.  */
   2,	/* int_reassoc_width.  */
   4,	/* fp_reassoc_width.  */