Add a few extra cases to the test. NFC.

llvm-svn: 223417
diff --git a/llvm/test/Linker/Inputs/alignment.ll b/llvm/test/Linker/Inputs/alignment.ll
index d4093cd..337cb8e 100644
--- a/llvm/test/Linker/Inputs/alignment.ll
+++ b/llvm/test/Linker/Inputs/alignment.ll
@@ -1 +1,12 @@
-@X = global i32 7, align 8
+@A = global i32 7, align 8
+@B = global i32 7, align 4
+
+define void @C() align 8 {
+  ret void
+}
+
+define void @D() align 4 {
+  ret void
+}
+
+@E = common global i32 0, align 8