crossgcc: Update toolchain

New tools:
* mpfr 3.1.4
* binutils 2.26
* gcc 5.3.0
* llvm/clang 3.8.0

Patch changes:
* binutils-2.25_fix-aarch64.patch: fixed in 2.26
* binutils-2.25_host-clang.patch: the positions of header file
  includes have been adjusted
* binutils-2.25_no-bfd-doc.patch: update to 2.26
* binutils-2.25_riscv.patch: update from riscv-gnu-toolchain
* gcc-5.2.0_elf_biarch.patch: update to 5.3.0
* gcc-5.2.0_gnat.patch: update to 5.3.0
* gcc-5.2.0_libgcc.patch: update to 5.3.0
* gcc-5.2.0_nds32.patch: update to 5.3.0
* gcc-5.2.0_riscv.patch: update from riscv-gnu-toolchain
* cfe-3.7.1.src_frontend.patch: update to 3.8.0

In the latest code of riscv-gnu-toolchain project, the patch for
{binutils,gcc}/config.sub has been removed, and the target is renamed
as riscv32 and riscv64. The `riscv' to `riscv64' change in xcompile is
in another commit.

Test results:
All GCC and LLVM/clang toolchain build successfully.

x86,arm: qemu boots
power8: firmware fails to boot
aarch64,mips: not tested
riscv: firmware fails to build with new binutils
clang: firmware fails to boot

Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Change-Id: I42ce89c29263d768d161c28199994f17d0389633
Reviewed-on: https://review.coreboot.org/14227
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index 3cee8f6..316e539 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -18,8 +18,8 @@
 
 cd $(dirname $0)
 
-CROSSGCC_DATE="April 3rd, 2016"
-CROSSGCC_VERSION="1.38"
+CROSSGCC_DATE="April 16th, 2016"
+CROSSGCC_VERSION="1.39"
 CROSSGCC_COMMIT=$( git describe )
 
 # default settings
@@ -33,18 +33,18 @@
 
 # GCC toolchain version numbers
 GMP_VERSION=6.1.0
-MPFR_VERSION=3.1.3
+MPFR_VERSION=3.1.4
 MPC_VERSION=1.0.3
 LIBELF_VERSION=0.8.13
-GCC_VERSION=5.2.0
+GCC_VERSION=5.3.0
 GCC_AUTOCONF_VERSION=2.69
-BINUTILS_VERSION=2.25
+BINUTILS_VERSION=2.26
 GDB_VERSION=7.9.1
 IASL_VERSION=20160318
 PYTHON_VERSION=3.4.3
 EXPAT_VERSION=2.1.0
 # CLANG version number
-CLANG_VERSION=3.7.1
+CLANG_VERSION=3.8.0
 MAKE_VERSION=4.1
 
 # GCC toolchain archive locations
@@ -674,7 +674,7 @@
 	i386-elf)		;;
 	i386-mingw32)		;;
 	mipsel-elf)		;;
-	riscv-elf)		;;
+	riscv-elf)		TARGETARCH=riscv64-elf;;
 	powerpc64*-linux*)	;;
 	i386*)			TARGETARCH=i386-elf;;
 	arm*)			TARGETARCH=arm-eabi;;