support/config-fragments/autobuild: use Bootlin toolchain for NIOS2 glibc

Instead of using an external toolchain built specifically for the
autobuilders to test nios2/glibc, use a pre-built Bootlin toolchain.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

support/config-fragments/autobuild/bootlin-nios2-glibc.config

@@ -0,0 +1,4 @@
+BR2_nios2=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_NIOS2_GLIBC_STABLE=y

support/config-fragments/autobuild/br-nios2-glibc.config

@@ -1,9 +0,0 @@
-BR2_nios2=y
-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-nios2-full-2020.02.tar.bz2"
-BR2_TOOLCHAIN_EXTERNAL_GCC_8=y
-BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_4=y
-BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
-BR2_TOOLCHAIN_EXTERNAL_CXX=y

support/config-fragments/autobuild/toolchain-configs.csv

@@ -32,6 +32,7 @@ support/config-fragments/autobuild/bootlin-m68k-5208-uclibc.config,x86_64
 support/config-fragments/autobuild/bootlin-microblazeel-uclibc.config,x86_64
 support/config-fragments/autobuild/bootlin-mipsel-uclibc.config,x86_64
 support/config-fragments/autobuild/bootlin-mipsel32r6-glibc.config,x86_64
+support/config-fragments/autobuild/bootlin-nios2-glibc.config,x86_64
 support/config-fragments/autobuild/bootlin-x86-64-glibc.config,x86_64
 support/config-fragments/autobuild/br-arc-full-internal.config,any
 support/config-fragments/autobuild/br-arc-internal-glibc.config,any
@@ -45,7 +46,6 @@ support/config-fragments/autobuild/br-i386-pentium-mmx-musl.config,x86_64
 support/config-fragments/autobuild/br-microblazeel-full-internal.config,any
 support/config-fragments/autobuild/br-mips64-n64-full.config,x86_64
 support/config-fragments/autobuild/br-mips64r6-el-hf-glibc.config,x86_64
-support/config-fragments/autobuild/br-nios2-glibc.config,x86_64
 support/config-fragments/autobuild/br-openrisc-uclibc.config,x86_64
 support/config-fragments/autobuild/br-powerpc-603e-basic-cpp.config,x86_64
 support/config-fragments/autobuild/br-powerpc64le-power8-glibc.config,x86_64