support/config-fragments: Add LoongArch64 toolchain support

Add full/glibc variant of LoongArch64 internal toolchain.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

support/config-fragments/autobuild/br-loongarch64-full-internal.config

@@ -0,0 +1,3 @@
+BR2_loongarch64=y
+BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
+BR2_TOOLCHAIN_BUILDROOT_CXX=y

support/config-fragments/autobuild/br-loongarch64-internal-glibc.config

@@ -0,0 +1,3 @@
+BR2_loongarch64=y
+BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
+BR2_TOOLCHAIN_BUILDROOT_CXX=y

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

@@ -50,6 +50,8 @@ support/config-fragments/autobuild/br-arm-internal-full.config,any
 support/config-fragments/autobuild/br-arm-internal-glibc.config,any
 support/config-fragments/autobuild/br-arm-internal-musl.config,any
 support/config-fragments/autobuild/br-i386-pentium4-full.config,x86_64
+support/config-fragments/autobuild/br-loongarch64-full-internal.config,any
+support/config-fragments/autobuild/br-loongarch64-internal-glibc.config,any
 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