"Fix" calls to undefined functions

This fixes any calls to undefined functions by commenting
out the code. Almost all the changes are calls to gcc_jit_*
functions which will eventually need to be ported to LLVM,
but commenting them out for now allows static analysis to
find any regressions where actual attempts to call undefined
functions are made.

Author: driusan

.phan/config.php

@@ -18,7 +18,6 @@
 		'PhanTypeMismatchDimFetchNullable',
 		'PhanUndeclaredMethod',
 		'PhanTypeMismatchArgument',
-		'PhanUndeclaredFunction',
 		'PhanUndeclaredStaticMethod',
 		'PhanUndeclaredConstant',
 		'PhanTypeExpectedObjectPropAccess',

ext/types/strlen.php

@@ -1,7 +1,7 @@
 <?php
 
 # This file is generated, changes you make will be lost.
-# Make your changes in /compiler/ext/types/strlen.pre instead.
+# Make your changes in /home/driusan/Code/php-compiler/ext/types/strlen.pre instead.
 
 /*
  * This file is part of PHP-Compiler, a PHP CFG Compiler for PHP code
@@ -43,10 +43,82 @@ public function call(Context $context, Variable ... $args): Value {
         $argValue = $context->helper->loadValue($args[0]);
         switch ($args[0]->type) {
             case Variable::TYPE_STRING:
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                 $offset = $this->context->structFieldMap[$argValue->typeOf()->getElementType()->getName()]['length'];
                     $result = $this->context->builder->load(
                         $this->context->builder->structGep($argValue, $offset)
                     );
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                 return $result;
         }