support/testing: TestFileCapabilities: update kernel to 4.19.310

Since the toolchain Bootlin update to 2023.11-1 [1], the arm Linux
kernel build is broken with binutils >= 2.41 with:

  arch/arm/mm/proc-v7.S: Assembler messages:
  arch/arm/mm/proc-v7.S:640: Error: junk at end of line, first unrecognized character is `#'

A similar issue has already be fixed for qemu m68k [2].

Bump to the latest kernel 4.19 that already include the backport
of 790756c7e022 ("ARM: 8933/1: replace Sun/Solaris style flag on section directive")

[1] 7e0e6e3b8618ab942f25b11ee72fbc5a4deefdf1
[2] a1ce9474e40f731f327035d8c0962abb16f00ff7

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/6414160106 (TestFileCapabilities)

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

support/testing/tests/core/test_file_capabilities.py

@@ -13,7 +13,7 @@ class TestFileCapabilities(infra.basetest.BRTest):
         BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
         BR2_LINUX_KERNEL=y
         BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-        BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19.204"
+        BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19.310"
         BR2_LINUX_KERNEL_DEFCONFIG="vexpress"
         BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="{}"
         BR2_LINUX_KERNEL_DTS_SUPPORT=y