S390: Platform specific includes in common files

src/interpreter/interpreter-assembler.cc

Index: src/interpreter/interpreter-assembler.cc
diff --git a/src/interpreter/interpreter-assembler.cc b/src/interpreter/interpreter-assembler.cc
index a56f498eb820280d82e3fc2000269551f48d7885..ad78a0a256eaf9ba85c187a4aa148632fc46d17b 100644
--- a/src/interpreter/interpreter-assembler.cc
+++ b/src/interpreter/interpreter-assembler.cc
@@ -530,7 +530,8 @@ bool InterpreterAssembler::TargetSupportsUnalignedAccess() {
   return false;
 #elif V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_ARM64 || V8_TARGET_ARCH_PPC
   return CpuFeatures::IsSupported(UNALIGNED_ACCESSES);
-#elif V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X64 || V8_TARGET_ARCH_X87
+#elif V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X64 || V8_TARGET_ARCH_X87 || \
+    V8_TARGET_ARCH_S390
   return true;
 #else
 #error "Unknown Architecture"