JIT: Fixed exit from CALL VM with GCC Global Register Variables

PHP JIT supports three configurations: HYRBID, CALL with global register
variables feature(CALL+GRV for short), and CALL+noGRV.

CALL+GRV mode can be built with the following commands:

```
  php Zend/zend_vm_gen.php --with-vm-kind=CALL
  ./buildconf -f; ./configure; make
```

About 230 test cases failed for tracing JIT under CALL+GRV mode on both
x86 and arm64 machines.

For CALL+GRV mode, the condition to determine whether the execution of
an oparray is finished, is "opline == NULL". See function execute_ex()
around line "if (UNEXPECTED(!OPLINE)) {".

However, such cleanup operation is missing for the JIT wrapper
zend_jit_trace_counter_helper(), and the trace_halt stub function.

Tests:
1. test cases: all .phpt test cases under "Zend/tests/ tests/
ext/opcache/tests/jit/".
2. both JIT/x86 and JIT/arm64: function JIT, tracing JIT and tracing JIT
with "--repeat 3"
3. execution modes: NTS/ZTS, HYBRID/CALL+GRV/CALL+noGRV

In my local test, these test cases passed under all JIT configrations.

Author: shqking

ext/opcache/jit/zend_jit_vm_helpers.c

@@ -308,7 +308,10 @@ static zend_always_inline ZEND_OPCODE_HANDLER_RET ZEND_FASTCALL zend_jit_trace_c
 	if (UNEXPECTED(*(ZEND_OP_TRACE_INFO(opline, offset)->counter) <= 0)) {
 		*(ZEND_OP_TRACE_INFO(opline, offset)->counter) = ZEND_JIT_COUNTER_INIT;
 		if (UNEXPECTED(zend_jit_trace_hot_root(execute_data, opline) < 0)) {
-#ifndef HAVE_GCC_GLOBAL_REGS
+#ifdef HAVE_GCC_GLOBAL_REGS
+			opline = NULL;
+			return;
+#else
 			return -1;
 #endif
 		}

ext/opcache/jit/zend_jit_x86.dasc

@@ -2424,7 +2424,8 @@ static int zend_jit_trace_halt_stub(dasm_State **Dst)
 		|	EXT_JMP zend_jit_halt_op->handler, r0
 	} else if (GCC_GLOBAL_REGS) {
 		|	add r4, SPAD // stack alignment
-		|	ret // PC must be zero
+		|	xor IP, IP // PC must be zero
+		|	ret
 	} else {
 		|	mov FP, aword T2 // restore FP
 		|	mov RX, aword T3 // restore IP