arc: use stable tags for binutils/gcc

toolchain/binutils/Makefile.inc

@@ -24,9 +24,10 @@ PKG_SITES:=		${MASTER_SITE_GNU:=binutils/}
 DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.gz
 endif
 ifeq ($(ADK_TOOLCHAIN_BINUTILS_2_23_ARC),y)
-PKG_VERSION:=		fc013006f64af9933a0b3171d5e48d8dfd53e44b
+PKG_VERSION:=		arc-2015.12
+PKG_GIT:=		tag
 PKG_RELEASE:=		1
-PKG_SITES:=		https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb_refact.git
+PKG_SITES:=		https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb.git
 DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.xz
 endif
 ifeq ($(ADK_TOOLCHAIN_BINUTILS_2_22),y)

toolchain/gcc/Makefile.inc

@@ -35,7 +35,8 @@ DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.gz
 LIBSTDCXXVER:=		19
 endif
 ifeq ($(ADK_TOOLCHAIN_GCC_4_8_ARC),y)
-PKG_VERSION:=		b0c367bdc9879a8e9ae5d352f02302b82512434e
+PKG_VERSION:=		arc-2015.12
+PKG_GIT:=		tag
 PKG_SITES:=		https://github.com/foss-for-synopsys-dwc-arc-processors/gcc.git
 PKG_RELEASE:=		1
 DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.xz