[lldb][AArch64] Correct compile options for Neon corefile

[DavidSpickett]

Summary

SVE is not required, it has its own test. Note that
there is no "+neon" so "+simd" is used instead.

Also rename the file to match the name of the corefile
it produces.

[DavidSpickett]

Originally added in https://reviews.llvm.org/D77793.

[omjavaid]

Thanks for fixing this. SVE was just a typo orignal core files were generated without SVE flag on a aarch64-linux target.

lldb/test/API/functionalities/postmortem/elf-core/linux-aarch64-neon.c

-// compile with -march=armv8-a+sve on compatible aarch64 compiler
-// linux-aarch64-sve.core was generated by: aarch64-linux-gnu-gcc-8
-// commandline: -march=armv8-a+sve -nostdlib -static -g linux-aarch64-sve.c
+// compile with -march=armv8-a+simd on compatible aarch64 compiler
+// linux-aarch64-neon.core was generated by: aarch64-linux-gnu-gcc-8
+// commandline: -march=armv8-a+simd -nostdlib -static -g linux-aarch64-neon.c
 static void bar(char *boom) {
   char F = 'b';
   asm volatile("fmov     d0,  #0.5\n\t");
   asm volatile("fmov     d1,  #1.5\n\t");
   asm volatile("fmov     d2,  #2.5\n\t");
   asm volatile("fmov     d3,  #3.5\n\t");
   asm volatile("fmov     s4,  #4.5\n\t");
   asm volatile("fmov     s5,  #5.5\n\t");