toolchain: Update to GCC 8.3.0

Update GCC to 8.3.0
Refresh patches
Allow GCC to be used for ARC
Source: https://github.com/openwrt/openwrt/pull/1803#issuecomment-462334890

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

toolchain/gcc/Config.in

@@ -22,7 +22,6 @@ choice
 
 	config GCC_USE_VERSION_8
 		bool "gcc 8.x"
-		depends on !arc
 endchoice
 
 config GCC_USE_GRAPHITE

toolchain/gcc/Config.version

@@ -19,5 +19,5 @@ config GCC_VERSION
 	string
 	default "5.5.0"		if GCC_VERSION_5
 	default "arc-2017.09-release"   if GCC_VERSION_7_1_ARC
-	default "8.2.0"		if GCC_VERSION_8
+	default "8.3.0"		if GCC_VERSION_8
 	default "7.4.0"

toolchain/gcc/common.mk

@@ -36,8 +36,8 @@ ifeq ($(PKG_VERSION),7.4.0)
   PKG_HASH:=eddde28d04f334aec1604456e536416549e9b1aa137fc69204e65eb0c009fe51
 endif
 
-ifeq ($(PKG_VERSION),8.2.0)
+ifeq ($(PKG_VERSION),8.3.0)
-  PKG_HASH:=196c3c04ba2613f893283977e6011b2345d1cd1af9abeac58e916b1aab3e0080
+  PKG_HASH:=64baadfe6cc0f4947a84cb12d7f0dfaf45bb58b7e92461639596c21e02d97d2c
 endif
 
 ifneq ($(CONFIG_GCC_VERSION_7_1_ARC),)

toolchain/gcc/patches/8.3.0/870-ppc_no_crtsavres.patch

@@ -1,6 +1,6 @@
 --- a/gcc/config/rs6000/rs6000.c
 +++ b/gcc/config/rs6000/rs6000.c
-@@ -24501,7 +24501,7 @@ rs6000_savres_strategy (rs6000_stack_t *
+@@ -24632,7 +24632,7 @@ rs6000_savres_strategy (rs6000_stack_t *
    /* Define cutoff for using out-of-line functions to save registers.  */
    if (DEFAULT_ABI == ABI_V4 || TARGET_ELF)
      {

toolchain/gcc/patches/8.3.0/910-mbsd_multi.patch

@@ -114,7 +114,7 @@ Date:   Tue Jul 31 00:52:27 2007 +0000
  ; On SVR4 targets, it also controls whether or not to emit a
 --- a/gcc/opts.c
 +++ b/gcc/opts.c
-@@ -2056,6 +2056,9 @@ common_handle_option (struct gcc_options
+@@ -2065,6 +2065,9 @@ common_handle_option (struct gcc_options
  			       opts, opts_set, loc, dc);
        break;
  
@@ -126,7 +126,7 @@ Date:   Tue Jul 31 00:52:27 2007 +0000
        opts->x_warn_larger_than = value != -1;
 --- a/gcc/doc/invoke.texi
 +++ b/gcc/doc/invoke.texi
-@@ -7012,6 +7012,17 @@ This option is only supported for C and
+@@ -7014,6 +7014,17 @@ This option is only supported for C and
  @option{-Wall} and by @option{-Wpedantic}, which can be disabled with
  @option{-Wno-pointer-sign}.