toolchain/toolchain-buildroot: glibc 2.32 for ARC needs linux-headers >= 5.1.0

The ARC support has been merged into glibc 2.32 but it requires
linux-headers >= 5.1.0 [1].

Fixes:
https://gitlab.com/kubu93/toolchains-builder/-/jobs/895774971

[1] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=0be8ae3679570ff9a193615a035fc8074a8c704f

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: ARC Maintainers <arc-buildroot@synopsys.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

toolchain/toolchain-buildroot/Config.in

@@ -56,6 +56,7 @@ config BR2_TOOLCHAIN_BUILDROOT_GLIBC
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10 || !BR2_powerpc64le
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5 || !BR2_MIPS_NAN_2008
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_0 || !BR2_RISCV_64
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_1 || !BR2_arc
 	depends on !BR2_powerpc_SPE
 	depends on BR2_RISCV_ISA_RVA || !BR2_riscv
 	select BR2_TOOLCHAIN_USES_GLIBC