[PHP] add indentation tests (sublimehq#2328)

Author: Keith Hall

PHP/tests/syntax_test_indentation.php

@@ -0,0 +1,58 @@
+// SYNTAX TEST reindent "Packages/PHP/PHP.sublime-syntax"
+
+https://github.com/sublimehq/Packages/issues/1924
+<?php if (true): ?>
+    asdfadf
+<?php elseif(false): ?>
+    asdf
+<?php endif;?>
+
+<?php
+if (true) {
+    ?>
+    asdfadf
+    <?php
+}
+
+if (a == 2) {
+    echo 'test';
+} elseif (b == 1) {
+    echo b;
+}
+?>
+
+https://github.com/sublimehq/Packages/issues/1175
+<?php
+if ('a:b') return;
+if ('a:b') { return; }
+if (true) echo('a:b');
+?>
+
+https://github.com/sublimehq/Packages/issues/901
+<?
+function test()
+{
+    if (true)
+    {
+        blah;
+    }
+    else
+    {
+        ok;
+    }
+
+    if (true)
+    {
+        blah;
+    } else
+    {
+        ok;
+    }
+
+    if (true)
+        blah;
+    else {
+        ok;
+    }
+}
+?>