toolchain-external: bump CodeSourcery NIOSII to 2016.05

The toolchain still use binutils 2.25 without the fix for PR19405.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
diff --git a/toolchain/toolchain-external/Config.in b/toolchain/toolchain-external/Config.in
index 0ba5d46..ce2d91e 100644
--- a/toolchain/toolchain-external/Config.in
+++ b/toolchain/toolchain-external/Config.in
@@ -403,7 +403,7 @@
 	      Disable 'Use soft-float'
 
 config BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII
-	bool "Sourcery CodeBench Nios-II 2015.11"
+	bool "Sourcery CodeBench Nios-II 2016.05"
 	depends on BR2_nios2
 	depends on BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "x86"
 	depends on !BR2_STATIC_LIBS
@@ -411,13 +411,13 @@
 	select BR2_TOOLCHAIN_HAS_NATIVE_RPC
 	select BR2_INSTALL_LIBSTDCPP
 	select BR2_HOSTARCH_NEEDS_IA32_LIBS
-	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_5
 	select BR2_TOOLCHAIN_HAS_BINUTILS_BUG_19405 # based-on binutils-2.25.1
 	help
 	  Sourcery CodeBench toolchain for the Nios-II architecture,
-	  from Mentor Graphics. It uses gcc 5.2, binutils 2.25.51,
-	  glibc 2.22, gdb 7.10.50 and kernel headers 4.2.
+	  from Mentor Graphics. It uses gcc 5.3, binutils 2.25.51,
+	  glibc 2.23, gdb 7.10.50 and kernel headers 4.4.
 
 config BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH
 	bool "Sourcery CodeBench SH 2012.09"