util/crossgcc: Update GCC from 11.2 to 11.3

While the work on updating GCC to version 12 is still WIP, update it
to the latest minor release 11.3.

Signed-off-by: Felix Singer <felixsinger@posteo.net>
Change-Id: I8810bbb238b01985774ff8da1e246ab1b192e663
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70221
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>

util/crossgcc/buildgcc

@@ -37,7 +37,7 @@ COREBOOT_MIRROR_URL="https://www.coreboot.org/releases/crossgcc-sources"
 GMP_VERSION=6.2.1
 MPFR_VERSION=4.2.0
 MPC_VERSION=1.3.1
-GCC_VERSION=11.2.0
+GCC_VERSION=11.3.0
 BINUTILS_VERSION=2.37
 IASL_VERSION="R10_20_22"
 # CLANG version number

util/crossgcc/sum/gcc-11.2.0.tar.xz.cksum

@@ -1 +0,0 @@
-f902ccacecf8949978d6261e9f1d034cff73ffdb  tarballs/gcc-11.2.0.tar.xz

util/crossgcc/sum/gcc-11.3.0.tar.xz.cksum

@@ -0,0 +1 @@
+cf86a48278f9a6f4b03d4390550577b20353b4e9  tarballs/gcc-11.3.0.tar.xz