crossgcc: upgrade Expat from 2.2.9 to 2.4.1

Versions of expat before 2.4.0 have been renamed to prevent their
use, due to some kind of vulnerability. without updating this
dependency it is currently not possible to build crossgcc with GDB.

Change-Id: Iec2cf560902dc556a41206d7dcd65c22cf3e1215
Signed-off-by: Mackenzie May <ky0ko@disroot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56868
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index aee55f9..7176e6b 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -41,7 +41,7 @@
 GDB_VERSION=9.2
 IASL_VERSION=20210331
 PYTHON_VERSION=3.8.5
-EXPAT_VERSION=2.2.9
+EXPAT_VERSION=2.4.1
 # CLANG version number
 CLANG_VERSION=12.0.0
 CMAKE_VERSION=3.20.3
diff --git a/util/crossgcc/sum/expat-2.2.9.tar.bz2.cksum b/util/crossgcc/sum/expat-2.2.9.tar.bz2.cksum
deleted file mode 100644
index 924b412..0000000
--- a/util/crossgcc/sum/expat-2.2.9.tar.bz2.cksum
+++ /dev/null
@@ -1 +0,0 @@
-ef5c1c55913a6ab18496ee99166f86269c7cdc31  tarballs/expat-2.2.9.tar.bz2
diff --git a/util/crossgcc/sum/expat-2.4.1.tar.bz2.cksum b/util/crossgcc/sum/expat-2.4.1.tar.bz2.cksum
new file mode 100644
index 0000000..5b520f3
--- /dev/null
+++ b/util/crossgcc/sum/expat-2.4.1.tar.bz2.cksum
@@ -0,0 +1 @@
+b677b9a1cf3a1424fda183223fae2c58f50151af  tarballs/expat-2.4.1.tar.bz2