add regex for ./ match

src/cmd/go/internal/work/security.go

@@ -209,7 +209,7 @@ var validLinkerFlags = []*lazyregexp.Regexp{
 	re(`-Wl,-z,relro`),
 
 	re(`[a-zA-Z0-9_/].*\.(a|o|obj|dll|dylib|so|tbd)`), // direct linker inputs: x.o or libfoo.so (but not -foo.o or @foo.o)
-	re(`\./.*\.(a|o|obj|dll|dylib|so)`),
+	re(`\./.*\.(a|o|obj|dll|dylib|so|tbd)`),
 }
 
 var validLinkerFlagsWithNextArg = []string{

src/cmd/go/internal/work/security_test.go

@@ -165,6 +165,7 @@ var goodLinkerFlags = [][]string{
 	{"-Wl,-framework,Chocolate"},
 	{"-Wl,-unresolved-symbols=ignore-all"},
 	{"libcgotbdtest.tbd"},
+	{"./libcgotbdtest.tbd"},
 }
 
 var badLinkerFlags = [][]string{