[ELF,test] Set alignment of SHT_GROUP to 4

Fixes: 0930f62cf600d9e2e9a45fef1b3a422d50be89d5

This makes the test more conforming and fixes a -fsanitize=alignment
failure in finalizeShtGroup.

GitOrigin-RevId: 0ab5d8ba023f920e03dcd328f62c4df1855af374
diff --git a/test/ELF/linkorder-group.test b/test/ELF/linkorder-group.test
index 988f793..0d25413 100644
--- a/test/ELF/linkorder-group.test
+++ b/test/ELF/linkorder-group.test
@@ -31,6 +31,7 @@
     Type:            SHT_GROUP
     Link:            .symtab
     Info:            foo
+    AddressAlign:    4
     Members:
       - SectionOrType:   GRP_COMDAT
       - SectionOrType:   .bss