cmd/link: fix a few typos in comments

Comment changes to fix typos, no code changes.

Change-Id: I6c915f183025587fc479d14f5d2c885767348b1b
Reviewed-on: https://go-review.googlesource.com/131615Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/cmd/link/internal/ld/ar.go

@@ -106,7 +106,7 @@ func hostArchive(ctxt *Link, name string) {
 		var load []uint64
 		for _, s := range ctxt.Syms.Allsym {
 			for i := range s.R {
-				r := &s.R[i] // Copying sym.Reloc has measurable impact on peformance
+				r := &s.R[i] // Copying sym.Reloc has measurable impact on performance
 				if r.Sym != nil && r.Sym.Type == sym.SXREF {
 					if off := armap[r.Sym.Name]; off != 0 && !loaded[off] {
 						load = append(load, off)

src/cmd/link/internal/ld/data.go

@@ -777,7 +777,7 @@ func Datblk(ctxt *Link, addr int64, size int64) {
 			continue
 		}
 		for i := range sym.R {
-			r := &sym.R[i] // Copying sym.Reloc has measurable impact on peformance
+			r := &sym.R[i] // Copying sym.Reloc has measurable impact on performance
 			rsname := ""
 			if r.Sym != nil {
 				rsname = r.Sym.Name

src/cmd/link/internal/ld/dwarf.go

@@ -1062,7 +1062,7 @@ func importInfoSymbol(ctxt *Link, dsym *sym.Symbol) {
 	dsym.Attr |= sym.AttrNotInSymbolTable | sym.AttrReachable
 	dsym.Type = sym.SDWARFINFO
 	for i := range dsym.R {
-		r := &dsym.R[i] // Copying sym.Reloc has measurable impact on peformance
+		r := &dsym.R[i] // Copying sym.Reloc has measurable impact on performance
 		if r.Type == objabi.R_DWARFSECREF && r.Sym.Size == 0 {
 			if ctxt.BuildMode == BuildModeShared {
 				// These type symbols may not be present in BuildModeShared. Skip.
@@ -1092,7 +1092,7 @@ func collectAbstractFunctions(ctxt *Link, fn *sym.Symbol, dsym *sym.Symbol, absf
 	// Walk the relocations on the primary subprogram DIE and look for
 	// references to abstract funcs.
 	for i := range dsym.R {
-		reloc := &dsym.R[i] // Copying sym.Reloc has measurable impact on peformance
+		reloc := &dsym.R[i] // Copying sym.Reloc has measurable impact on performance
 		candsym := reloc.Sym
 		if reloc.Type != objabi.R_DWARFSECREF {
 			continue
@@ -1804,7 +1804,7 @@ func collectlocs(ctxt *Link, syms []*sym.Symbol, units []*compilationUnit) []*sy
 	for _, u := range units {
 		for _, fn := range u.funcDIEs {
 			for i := range fn.R {
-				reloc := &fn.R[i] // Copying sym.Reloc has measurable impact on peformance
+				reloc := &fn.R[i] // Copying sym.Reloc has measurable impact on performance
 				if reloc.Type == objabi.R_DWARFSECREF && strings.HasPrefix(reloc.Sym.Name, dwarf.LocPrefix) {
 					reloc.Sym.Attr |= sym.AttrReachable | sym.AttrNotInSymbolTable
 					syms = append(syms, reloc.Sym)

src/cmd/link/internal/ld/lib.go

@@ -504,7 +504,7 @@ func (ctxt *Link) loadlib() {
 		any := false
 		for _, s := range ctxt.Syms.Allsym {
 			for i := range s.R {
-				r := &s.R[i] // Copying sym.Reloc has measurable impact on peformance
+				r := &s.R[i] // Copying sym.Reloc has measurable impact on performance
 				if r.Sym != nil && r.Sym.Type == sym.SXREF && r.Sym.Name != ".got" {
 					any = true
 					break