Add support for '|' in expressions.

llvm-svn: 279480
diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index ed6b39e..c00791d 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -826,6 +826,7 @@
       .Case("==", 2)
       .Case("!=", 2)
       .Case("&", 1)
+      .Case("|", 1)
       .Default(-1);
 }
 
@@ -1102,6 +1103,8 @@
     return [=](uint64_t Dot) { return L(Dot) != R(Dot); };
   if (Op == "&")
     return [=](uint64_t Dot) { return L(Dot) & R(Dot); };
+  if (Op == "|")
+    return [=](uint64_t Dot) { return L(Dot) | R(Dot); };
   llvm_unreachable("invalid operator");
 }