Reorganize backend build files to match target and make more similar …

…per line (#16672)

compiler/src/build.d

@@ -1578,10 +1578,12 @@ auto sourceFiles()
  cparse.d
  "),
  backendHeaders: fileArray(env["C"], "
- cc.d cdef.d cgcv.d code.d cv4.d dt.d el.d global.d
- obj.d oper.d rtlsym.d x86/code_x86.d iasm.d codebuilder.d
- ty.d type.d mach.d mscoff.d dwarf.d dwarf2.d x86/xmm.d
- dlist.d melf.d
+ cc.d cdef.d cgcv.d code.d dt.d el.d global.d
+ obj.d oper.d rtlsym.d iasm.d codebuilder.d
+ ty.d type.d dlist.d
+ dwarf.d dwarf2.d cv4.d
+ melf.d mscoff.d mach.d
+ x86/code_x86.d x86/xmm.d
  "),
  };
  foreach (member; __traits(allMembers, DmdSources))
@@ -1617,12 +1619,16 @@ auto sourceFiles()
  "),
  backend: fileArray(env["C"], "
  bcomplex.d evalu8.d divcoeff.d dvec.d go.d gsroa.d glocal.d gdag.d gother.d gflow.d
- dout.d inliner.d
- gloop.d compress.d cgelem.d cgcs.d ee.d x86/cod4.d x86/cod5.d eh.d x86/nteh.d blockopt.d mem.d cg.d x86/cgreg.d
- dtype.d debugprint.d fp.d symbol.d symtab.d elem.d dcode.d cgsched.d x86/cg87.d x86/cgxmm.d x86/cgcod.d x86/cod1.d x86/cod2.d
- x86/cod3.d cv8.d dcgcv.d pdata.d util2.d var.d backconfig.d drtlsym.d dwarfeh.d ptrntab.d
- dvarstats.d dwarfdbginf.d cgen.d goh.d barray.d cgcse.d elpicpie.d
- machobj.d elfobj.d mscoffobj.d filespec.d cgobj.d aarray.d x86/disasm86.d arm/disasmarm.d
+ dout.d inliner.d eh.d filespec.d cgobj.d aarray.d
+ gloop.d compress.d cgelem.d cgcs.d ee.d blockopt.d mem.d cg.d
+ dtype.d debugprint.d fp.d symbol.d symtab.d elem.d dcode.d cgsched.d
+ pdata.d util2.d var.d backconfig.d drtlsym.d ptrntab.d
+ dvarstats.d cgen.d goh.d barray.d cgcse.d elpicpie.d
+ dwarfeh.d dwarfdbginf.d cv8.d dcgcv.d
+ machobj.d elfobj.d mscoffobj.d
+ x86/nteh.d x86/cgreg.d x86/cg87.d x86/cgxmm.d x86/disasm86.d
+ x86/cgcod.d x86/cod1.d x86/cod2.d x86/cod3.d x86/cod4.d x86/cod5.d
+ arm/disasmarm.d
  "
  ),
  };