Add Meson cross build definition file for s390x (#6729)

REUSE.toml

@@ -344,3 +344,9 @@ path = "patches/**"
 precedence = "aggregate"
 SPDX-FileCopyrightText = "2026 RizinOrg <[email protected]>"
 SPDX-License-Identifier = "LGPL-3.0-only"
+
+[[annotations]]
+path = "cross-compile/**"
+precedence = "aggregate"
+SPDX-FileCopyrightText = "2026 RizinOrg <[email protected]>"
+SPDX-License-Identifier = "LGPL-3.0-only"

cross-compile/s390x.txt

@@ -0,0 +1,10 @@
+[binaries]
+c = 's390x-linux-gnu-gcc-9'
+strip = 's390x-linux-gnu-strip'
+exe_wrapper = 'qemu-s390x'
+
+[host_machine]
+system = 'linux'
+cpu_family = 's390x'
+cpu = 's390x'
+endian = 'big'