[lldb] [lit] Remove unnecessary array use in XMM reading test

[mgorny]

Summary

Remove the use of 2-element array for XMM data. It is an accidental
leftover from previous implementation attempt, and it is unnecessary
with xmm_t.

[labath]

This looks like the kind of thing you could have committed without review. :)

lldb/trunk/lit/Register/Inputs/x86-mm-xmm-read.cpp

 #include <cstdint>
 
 struct alignas(16) xmm_t {
   uint64_t a, b;
 };
 
 int main() {
   uint64_t mm0 = 0x0102030405060708;
   uint64_t mm1 = 0x1112131415161718;
   uint64_t mm2 = 0x2122232425262728;
   uint64_t mm3 = 0x3132333435363738;
   uint64_t mm4 = 0x4142434445464748;
   uint64_t mm5 = 0x5152535455565758;
   uint64_t mm6 = 0x6162636465666768;
   uint64_t mm7 = 0x7172737475767778;
 
-  xmm_t xmm0[2] = { 0x020406080A0C0E01, 0x030507090B0D0F00 };
-  xmm_t xmm1[2] = { 0x121416181A1C1E11, 0x131517191B1D1F10 };
-  xmm_t xmm2[2] = { 0x222426282A2C2E21, 0x232527292B2D2F20 };
-  xmm_t xmm3[2] = { 0x323436383A3C3E31, 0x333537393B3D3F30 };
-  xmm_t xmm4[2] = { 0x424446484A4C4E41, 0x434547494B4D4F40 };
-  xmm_t xmm5[2] = { 0x525456585A5C5E51, 0x535557595B5D5F50 };
-  xmm_t xmm6[2] = { 0x626466686A6C6E61, 0x636567696B6D6F60 };
-  xmm_t xmm7[2] = { 0x727476787A7C7E71, 0x737577797B7D7F70 };
+  xmm_t xmm0 = { 0x020406080A0C0E01, 0x030507090B0D0F00 };
+  xmm_t xmm1 = { 0x121416181A1C1E11, 0x131517191B1D1F10 };
+  xmm_t xmm2 = { 0x222426282A2C2E21, 0x232527292B2D2F20 };
+  xmm_t xmm3 = { 0x323436383A3C3E31, 0x333537393B3D3F30 };
+  xmm_t xmm4 = { 0x424446484A4C4E41, 0x434547494B4D4F40 };
+  xmm_t xmm5 = { 0x525456585A5C5E51, 0x535557595B5D5F50 };
+  xmm_t xmm6 = { 0x626466686A6C6E61, 0x636567696B6D6F60 };
+  xmm_t xmm7 = { 0x727476787A7C7E71, 0x737577797B7D7F70 };
 
   asm volatile(
     "movq    %0, %%mm0\n\t"
     "movq    %1, %%mm1\n\t"
     "movq    %2, %%mm2\n\t"
     "movq    %3, %%mm3\n\t"
     "movq    %4, %%mm4\n\t"
     "movq    %5, %%mm5\n\t"