feat(asm): encode the arm64 local-exec TLS load

Assisted-by: GLM 5.3 Flash

asm/arm64_frame.go

@@ -69,6 +69,12 @@ type arm64FrameInfo struct {
 	// autosize below StackSmall as NOSPLIT.
 	needSplit  bool
 	splitClass int // 0: <=StackSmall, 1: <=StackBig, 2: >StackBig
+
+	// tls holds the names the file's own GLOBL declarations mark TLSBSS:
+	// the toolchain's aclass keys the TLS-LE load off the symbol's type
+	// (objabi.STLSBSS), which only the file's declarations reveal.  A nil
+	// map answers no, the plain static-symbol load.
+	tls map[string]bool
 }
 
 // arm64ComputeFrame derives the frame layout for a TEXT function.