cmd/internal/link: disable selected DWARF tests on Solaris

Disable the three linker DWARF tests that invoke the compiler in
non-debug mode on Solaris, since this seems to trigger a split stack
overflow. These can be turned back on once the issue in question is
resolved.

Updates #23168.

Change-Id: I5be1b098e33e8bad3bc234a0964eab1dee7e7954
Reviewed-on: https://go-review.googlesource.com/84655Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Than McIntosh <thanm@google.com>

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

@@ -531,6 +531,9 @@ func TestInlinedRoutineRecords(t *testing.T) {
 	if runtime.GOOS == "plan9" {
 		t.Skip("skipping on plan9; no DWARF symbol table in executables")
 	}
+	if runtime.GOOS == "solaris" {
+		t.Skip("skipping on solaris, pending resolution of issue #23168")
+	}
 
 	const prog = `
 package main
@@ -748,6 +751,9 @@ func TestAbstractOriginSanity(t *testing.T) {
 	if runtime.GOOS == "plan9" {
 		t.Skip("skipping on plan9; no DWARF symbol table in executables")
 	}
+	if runtime.GOOS == "solaris" {
+		t.Skip("skipping on solaris, pending resolution of issue #23168")
+	}
 
 	abstractOriginSanity(t, OptInl4)
 }
@@ -758,6 +764,9 @@ func TestAbstractOriginSanityWithLocationLists(t *testing.T) {
 	if runtime.GOOS == "plan9" {
 		t.Skip("skipping on plan9; no DWARF symbol table in executables")
 	}
+	if runtime.GOOS == "solaris" {
+		t.Skip("skipping on solaris, pending resolution of issue #23168")
+	}
 	if runtime.GOARCH != "amd64" && runtime.GOARCH != "x86" {
 		t.Skip("skipping on not-amd64 not-x86; location lists not supported")
 	}