[lld] [lld][ELF] remove `consumeLabel` in ScriptLexer (PR #99567)

[Fangrui Song via llvm-commits]

================
@@ -1692,11 +1692,11 @@ ScriptParser::readSymbols() {
   while (!errorCount()) {
     if (consume("}"))
       break;
-    if (consumeLabel("local")) {
+    if (consume("local:") || (consume("local") && consume(":"))) {
       v = &locals;
       continue;
     }
-    if (consumeLabel("global")) {
+    if (consume("global:") || (consume("global") && consume(":"))) {
----------------
MaskRay wrote:

We should check `local:` and `global:` below at `StringRef tok = next();`

https://github.com/llvm/llvm-project/pull/99567