toolchain: Bump ARC tools to arc-2017.09 release

This commit finally bumps ARC tools to the most recent arc-2017.09 release version.

ARC GNU tools of version arc-2017.09 bring some quite significant changes like:
 * Binutils v2.29 with additional ARC patches
 * GCC 7.1.1 with additional ARC patches
 * glibc 2.26 with additional ARC patches

More information on this release could be found here:
https://github.com/foss-for-synopsys-dwc-arc-processors/toolchain/releases/tag/arc-2017.09-release

Signed-off-by: Evgeniy Didin <didin@synopsys.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: arc-buildroot@synopsys.com
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gcc/Config.in.host

@@ -92,7 +92,7 @@ config BR2_GCC_VERSION
 	default "5.5.0"     if BR2_GCC_VERSION_5_X
 	default "6.4.0"     if BR2_GCC_VERSION_6_X
 	default "7.2.0"     if BR2_GCC_VERSION_7_X
-	default "arc-2017.09-rc1" if BR2_GCC_VERSION_ARC
+	default "arc-2017.09-release" if BR2_GCC_VERSION_ARC
 	default "musl-5.4.0" if BR2_GCC_VERSION_OR1K
 
 config BR2_EXTRA_GCC_CONFIG_OPTIONS

package/gcc/arc-2017.09-rc1/0910-Update-uses-for-hw-loop-labels.patch

@@ -1,63 +0,0 @@
-From cb7f97fb860b5286d3470ccda0f623f4657780a3 Mon Sep 17 00:00:00 2001
-From: claziss <claziss@synopsys.com>
-Date: Tue, 19 Sep 2017 15:45:19 +0200
-Subject: [PATCH] [ARC][ZOL] Update uses for hw-loop labels.
-
-Make sure we mark the hw-loop labels as beeing used.
-
-gcc/
-2017-09-19  Claudiu Zissulescu  <claziss@synopsys.com>
-
-	* config/arc/arc.c (hwloop_optimize): Update hw-loop's end/start
-	labels number of usages.
-
-gcc/testsuite
-2017-09-19  Claudiu Zissulescu  <claziss@synopsys.com>
-
-	* gcc.target/arc/loop-2.cpp: New test.
----
- gcc/config/arc/arc.c                    |  3 +++
- gcc/testsuite/gcc.target/arc/arc.exp    |  2 +-
- gcc/testsuite/gcc.target/arc/loop-2.cpp | 18 ++++++++++++++++++
- 3 files changed, 22 insertions(+), 1 deletion(-)
- create mode 100644 gcc/testsuite/gcc.target/arc/loop-2.cpp
-
-diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
-index 5c0a872cc97..cc7fc624ff2 100644
---- a/gcc/config/arc/arc.c
-+++ b/gcc/config/arc/arc.c
-@@ -7613,6 +7613,9 @@ hwloop_optimize (hwloop_info loop)
-   /* Insert the loop end label before the last instruction of the
-      loop.  */
-   emit_label_after (end_label, loop->last_insn);
-+  /* Make sure we mark the begining and end label as used.  */
-+  LABEL_NUSES (loop->end_label)++;
-+  LABEL_NUSES (loop->start_label)++;
- 
-   return true;
- }
-diff --git a/gcc/testsuite/gcc.target/arc/loop-2.cpp b/gcc/testsuite/gcc.target/arc/loop-2.cpp
-new file mode 100644
-index 00000000000..d1dc917ba47
---- /dev/null
-+++ b/gcc/testsuite/gcc.target/arc/loop-2.cpp
-@@ -0,0 +1,18 @@
-+/* { dg-options "-O2" } *
-+/* { dg-do assemble } */
-+
-+/* This file fails to assemble if we forgot to increase the number of
-+   uses for loop's start and end labels.  */
-+int a, c, d;
-+int *b;
-+void fn1(int p1) {
-+  if (d == 5)
-+    for (int i; i < p1; ++i)
-+      if (c)
-+        b[i] = c;
-+      else
-+        int t = a = t;
-+  else
-+    for (int i; i < p1; ++i)
-+      b[i] = 0;
-+}
-

package/gcc/gcc.hash

@@ -8,6 +8,6 @@ sha512  02c60e54527c7adf584798d5251f8a0b80c93d5deafce82501b2c28e6692e0bd783927bb
 sha512  f853cd6530b4055d8d8289da74687cb4c6d5f363598d386332d31852b581bac76c3adb7d61889edec3b779f63d8646f0122840f12965ce4a4389ba535dbbb6e1  gcc-7.2.0.tar.xz
 
 # Locally calculated (fetched from Github)
-sha512  c30255dc937e23f6388b4c640455114bcf86cffe923191e32d33ffcde6c4980e9d1811e85877fed3e414ed069cc3e2013993ed76331088ff0846ac50421cb426  gcc-arc-2017.09-rc1.tar.gz
+sha512  c30addd3c4dc66b90749a0f99b257c8a8e7966d27f286057b6b66f4a70ca22a1ee50d92882c4db13307d769a6fb28e1e2a2bab749a692cf3f89ef0c38f145efa  gcc-arc-2017.09-release.tar.gz
 # Locally calculated (fetched from Github)
 sha512  841101f7de45f327bf2e92f3efc73ca88a021e4b9b541458ce80a16e55882bd8606a8492d75c57c589ee2c10d42ae2865b67690155d7289a541df1d68096402f  gcc-musl-5.4.0.tar.gz