cmd/go: look for .go.buildinfo section when looking for ELF version

Based on original fix from Mark Glines in golang.org/cl/186737

Fixes #31861

Change-Id: Ibd583a3aa8f8b8eefade998aa2ac757b55140937
Reviewed-on: https://go-review.googlesource.com/c/go/+/188957
Run-TryBot: Andrew Bonventre <andybons@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/cmd/go/internal/version/exe.go

@@ -103,6 +103,11 @@ func (x *elfExe) ReadData(addr, size uint64) ([]byte, error) {
 }
 
 func (x *elfExe) DataStart() uint64 {
+	for _, s := range x.f.Sections {
+		if s.Name == ".go.buildinfo" {
+			return s.Addr
+		}
+	}
 	for _, p := range x.f.Progs {
 		if p.Type == elf.PT_LOAD && p.Flags&(elf.PF_X|elf.PF_W) == elf.PF_W {
 			return p.Vaddr

src/cmd/go/testdata/script/version.txt

@@ -8,5 +8,12 @@ go version -m fortune.exe
 stdout '^\tpath\trsc.io/fortune'
 stdout '^\tmod\trsc.io/fortune\tv1.0.0'
 
+go build -buildmode=pie -o external.exe rsc.io/fortune
+go version external.exe
+stdout '^external.exe: .+'
+go version -m external.exe
+stdout '^\tpath\trsc.io/fortune'
+stdout '^\tmod\trsc.io/fortune\tv1.0.0'
+
 -- go.mod --
 module m