support/dependencies/dependencies.sh: libopenssl needs perl Math::BigInt on s390

libopenssl needs perl Math::BigInt for s390x asm to avoid the following
build failure since commit a5cacb63082b9e58194c4b9f8b2af2c3e38ff15c:

Can't locate bigint.pm in @INC (you may need to install the bigint module) (@INC contains: /home/buildroot/autobuild/instance-0/output-1/build/libopenssl-3.2.0/crypto/poly1305/asm/../.. /home/buildroot/autobuild/instance-0/output-1/host/lib/perl /usr/local/lib64/perl5/5.36 /usr/local/share/perl5/5.36 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at /home/buildroot/autobuild/instance-0/output-1/build/libopenssl-3.2.0/crypto/poly1305/asm/../../perlasm/s390x.pm line 16.
BEGIN failed--compilation aborted at /home/buildroot/autobuild/instance-0/output-1/build/libopenssl-3.2.0/crypto/poly1305/asm/../../perlasm/s390x.pm line 16.

Fixes:
 - http://autobuild.buildroot.org/results/986cb07d368c7214ffbc9d60c378e7ac00797f00

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/dependencies/dependencies.sh

@@ -282,6 +282,10 @@ required_perl_modules="$required_perl_modules Thread::Queue" # Used by host-auto
 required_perl_modules="$required_perl_modules FindBin" # Used by (host-)libopenssl
 required_perl_modules="$required_perl_modules IPC::Cmd" # Used by (host-)libopenssl
 
+if grep -q ^BR2_PACKAGE_LIBOPENSSL=y $BR2_CONFIG && grep -q ^BR2_s390x=y $BR2_CONFIG ; then
+    required_perl_modules="$required_perl_modules Math::BigInt"
+fi
+
 if grep -q ^BR2_PACKAGE_MOSH=y $BR2_CONFIG ; then
     required_perl_modules="$required_perl_modules diagnostics"
 fi