support/testing: update basic toolchain to bootlin bleeding-edge 2018.11-1

Update the toolchain being used by the testsuite infra.

The new toolchain 2018.11-1 is based on gcc 8.2, uClibc-ng 1.0.30,
linux-headers 4.14 and binutils 2.31.1.
Enable BR2_TOOLCHAIN_HAS_THREADS_DEBUG that is now required.

The old toolchain 2017.05 is based on gcc 4.9, uClibc-ng 1.0.25,
linux-headers 3.10 and binutils 2.27.

Tested with gitlab
https://gitlab.com/kubu93/buildroot/pipelines/132376578

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/infra/basetest.py

@@ -11,11 +11,11 @@ BASIC_TOOLCHAIN_CONFIG = \
     BR2_TOOLCHAIN_EXTERNAL=y
     BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
     BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
-    BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/br-arm-full-2017.05-1078-g95b1dae.tar.bz2"
-    BR2_TOOLCHAIN_EXTERNAL_GCC_4_9=y
-    BR2_TOOLCHAIN_EXTERNAL_HEADERS_3_10=y
+    BR2_TOOLCHAIN_EXTERNAL_URL="https://toolchains.bootlin.com/downloads/releases/toolchains/armv5-eabi/tarballs/armv5-eabi--uclibc--bleeding-edge-2018.11-1.tar.bz2"
+    BR2_TOOLCHAIN_EXTERNAL_GCC_8=y
+    BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_14=y
     BR2_TOOLCHAIN_EXTERNAL_LOCALE=y
-    # BR2_TOOLCHAIN_EXTERNAL_HAS_THREADS_DEBUG is not set
+    BR2_TOOLCHAIN_HAS_THREADS_DEBUG=y
     BR2_TOOLCHAIN_EXTERNAL_CXX=y
     """