[X86] Add verify-machineinstrs checks to baseptr tests

Help catch regressions from D145650 that were only noticed on EXPENSIVE_CHECKS builds

Author: RKSimon

llvm/test/CodeGen/X86/i386-baseptr.ll

@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc -mtriple=i386-pc-linux -stackrealign < %s | FileCheck %s
+; RUN: llc -mtriple=i386-pc-linux -stackrealign -verify-machineinstrs < %s | FileCheck %s
 
 declare i32 @helper() nounwind
 define void @base() #0 {

llvm/test/CodeGen/X86/x86-64-baseptr.ll

@@ -1,6 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc -mtriple=x86_64-pc-linux -stackrealign < %s | FileCheck %s
-; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -stackrealign < %s | FileCheck -check-prefix=X32ABI %s
+; RUN: llc -mtriple=x86_64-pc-linux -stackrealign -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -stackrealign -verify-machineinstrs < %s | FileCheck -check-prefix=X32ABI %s
 
 ; This should run with NaCl as well ( -mtriple=x86_64-pc-nacl ) but currently doesn't due to PR22655