[ARM] Add targets for Arm DebugInfo tests. NFC

This prevents the instructions being invalid for the subtarget.

Author: davemgreen

llvm/test/DebugInfo/ARM/cfi-eof-prologue.mir

@@ -79,7 +79,7 @@
   ; Function Attrs: nounwind
   declare void @llvm.stackprotector(i8*, i8**) #0
 
-  attributes #0 = { nounwind }
+  attributes #0 = { nounwind  "target-features"="+v8m" }
   attributes #1 = { nounwind readnone speculatable }
   attributes #2 = { nounwind readnone }
 

llvm/test/DebugInfo/MIR/ARM/call-site-info-vmovd.mir

@@ -37,7 +37,7 @@
   declare void @llvm.dbg.value(metadata, metadata, metadata)
   declare void @llvm.stackprotector(i8*, i8**)
 
-  attributes #0 = { "disable-tail-calls"="false" "frame-pointer"="all" }
+  attributes #0 = { "disable-tail-calls"="false" "frame-pointer"="all" "target-features"="+thumb-mode,+vfp2" }
 
   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!10, !11, !12, !13, !14}

llvm/test/DebugInfo/MIR/ARM/call-site-info-vmovs.mir

@@ -31,7 +31,7 @@
   declare void @llvm.dbg.value(metadata, metadata, metadata)
   declare void @llvm.stackprotector(i8*, i8**)
 
-  attributes #0 = { "disable-tail-calls"="false" "frame-pointer"="all" }
+  attributes #0 = { "disable-tail-calls"="false" "frame-pointer"="all" "target-features"="+thumb-mode,+vfp2" }
 
   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!10, !11, !12, !13, !14}

llvm/test/DebugInfo/MIR/ARM/dbgcall-site-interpretation.mir

@@ -80,7 +80,7 @@
   ; Function Attrs: nounwind
   declare void @llvm.stackprotector(i8*, i8**)
 
-  attributes #0 = { "frame-pointer"="all"}
+  attributes #0 = { "frame-pointer"="all" "target-features"="+armv7-a" }
 
   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!9, !10, !11, !12}