buildgcc: Update GCC, Binutils, GMP, MPFR, GDB, IASL and LLVM

- GCC gets updated from 5.2.0 to 6.3.0:
gcc-6.3.0_riscv.patch is a diff between 5fcb8c4 and 173684b in
riscv-gcc, and it needs gcc-6.3.0_memmodel.patch.

- Binutils goes from 2.26.1 to 2.28:
There is a build error for MIPS gold so I add patch for it.

- GMP gets a bump from 6.1.0 to 6.1.2
- MPFR is updated from 3.1.4 to 3.1.5
- GDB is upgraded from 6.1.1 to 6.1.2
- IASL is changed from 20160831 to 20161222
- LLVM is changed from 3.8.0 to 3.9.1

Change-Id: I20fea838d798c430d8c4d2cc6b07614d967c60c5
Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/17189
Tested-by: build bot (Jenkins)

util/crossgcc/buildgcc

@@ -18,8 +18,8 @@
 
 cd $(dirname $0)
 
-CROSSGCC_DATE="August 31st, 2016"
-CROSSGCC_VERSION="1.43"
+CROSSGCC_DATE="March 3rd, 2017"
+CROSSGCC_VERSION="1.44"
 CROSSGCC_COMMIT=$( git describe )
 
 # default settings
@@ -35,19 +35,19 @@ BOOTSTRAP=0
 THREADS=1
 
 # GCC toolchain version numbers
-GMP_VERSION=6.1.0
-MPFR_VERSION=3.1.4
+GMP_VERSION=6.1.2
+MPFR_VERSION=3.1.5
 MPC_VERSION=1.0.3
 LIBELF_VERSION=0.8.13
-GCC_VERSION=5.3.0
+GCC_VERSION=6.3.0
 GCC_AUTOCONF_VERSION=2.69
-BINUTILS_VERSION=2.26.1
-GDB_VERSION=7.11
-IASL_VERSION=20160831
+BINUTILS_VERSION=2.28
+GDB_VERSION=7.12
+IASL_VERSION=20161222
 PYTHON_VERSION=3.5.1
 EXPAT_VERSION=2.1.1
 # CLANG version number
-CLANG_VERSION=3.8.0
+CLANG_VERSION=3.9.1
 MAKE_VERSION=4.2.1
 
 # GCC toolchain archive locations