[LLD][ELF] Skip non-SHF_ALLOC sections when checking max VA and max VA difference in relaxOnce() (#145863)

For non-SHF_ALLOC sections, sh_addr is set to 0.
Skip sections without SHF_ALLOC flag, so `minVA` will not be set to 0
with non-SHF_ALLOC sections, and the size of non-SHF_ALLOC sections will
not contribute to `maxVA`.

lld/ELF/Arch/X86_64.cpp

@@ -320,6 +320,8 @@ bool X86_64::deleteFallThruJmpInsn(InputSection &is, InputFile *file,
 bool X86_64::relaxOnce(int pass) const {
   uint64_t minVA = UINT64_MAX, maxVA = 0;
   for (OutputSection *osec : ctx.outputSections) {
+    if (!(osec->flags & SHF_ALLOC))
+      continue;
     minVA = std::min(minVA, osec->addr);
     maxVA = std::max(maxVA, osec->addr + osec->size);
   }