[Hexagon] Add nounwind to hexagon-strcpy.ll (llvm#151293)

The test does not check for anything related to cfi information so we
don't really need them in the test checks. Also it looks like there were
some failures on the Alpine Linux builders due to the placement of the
cfi information in the output assembly.

I have also changed `-march` to `-mtriple` in the run line similar to
2208c97

Author: svs-quic

llvm/test/CodeGen/Hexagon/hexagon-strcpy.ll

@@ -1,20 +1,15 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
-; RUN: llc -march=hexagon -verify-machineinstrs  < %s | FileCheck %s
+; RUN: llc -mtriple=hexagon -verify-machineinstrs  < %s | FileCheck %s
 
 @.str = private unnamed_addr constant [31 x i8] c"DHRYSTONE PROGRAM, 3'RD STRING\00", align 1
 @.str1 = private unnamed_addr constant [3 x i8] c"%s\00", align 1
 
-; Function Attrs: nounwind
 declare i32 @printf(i8* nocapture readonly, ...)
 
 ; Function Attrs: nounwind
-define i32 @main() {
+define i32 @main() nounwind {
 ; CHECK-LABEL: main:
-; CHECK:         .cfi_startproc
-; CHECK-NEXT:  // %bb.0: // %entry
-; CHECK-NEXT:    .cfi_def_cfa r30, 8
-; CHECK-NEXT:    .cfi_offset r31, -4
-; CHECK-NEXT:    .cfi_offset r30, -8
+; CHECK:       // %bb.0: // %entry
 ; CHECK-NEXT:    {
 ; CHECK-NEXT:     r0 = ##.L.str1
 ; CHECK-NEXT:     r3:2 = CONST64(#2325073635944967245)
@@ -53,5 +48,4 @@ entry:
   ret i32 0
 }
 
-; Function Attrs: nounwind
 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1)