Update tests to not be as dependent on section numbers.

Many of these predate llvm-readobj. With elf-dump we had to match
a relocation to symbol number and symbol number to symbol name or
section number.

llvm-svn: 235015
diff --git a/llvm/test/MC/X86/expand-var.s b/llvm/test/MC/X86/expand-var.s
index ef62d8a..8d5529a 100644
--- a/llvm/test/MC/X86/expand-var.s
+++ b/llvm/test/MC/X86/expand-var.s
@@ -1,6 +1,6 @@
 // RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux < %s | llvm-readobj -r | FileCheck %s
 
-// CHECK:       Section (2) .rela.text {
+// CHECK:       Section {{.*}} .rela.text {
 // CHECK-NEXT:    0x0 R_X86_64_32 d 0x0
 // CHECK-NEXT:  }