Fix branch variable and test errors

Author: iluuu1994

.github/scripts/windows/find-target-branch.bat

@@ -1,4 +1,20 @@
 @echo off
 
-for /f "usebackq tokens=3" %%i in (`findstr PHP_MAJOR_VERSION main\php_version.h`) do set BRANCH=%%i
-for /f "usebackq tokens=3" %%i in (`findstr PHP_MINOR_VERSION main\php_version.h`) do set BRANCH=%BRANCH%.%%i
+if /i "%APPVEYOR%" equ "True" (
+	if /i "%APPVEYOR_REPO_BRANCH:~0,4%" equ "php-" (
+		set BRANCH=%APPVEYOR_REPO_BRANCH:~4,3%
+	) else (
+		set BRANCH=master
+	)
+) else (
+	if "%GITHUB_BASE_REF%" equ "master" (
+		set BRANCH=master
+	)
+	if "%GITHUB_HEAD_REF%" equ "master" (
+		set BRANCH=master
+	)
+	if "!BRANCH!" equ "" (
+		for /f "usebackq tokens=3" %%i in (`findstr PHP_MAJOR_VERSION main\php_version.h`) do set BRANCH=%%i
+		for /f "usebackq tokens=3" %%i in (`findstr PHP_MINOR_VERSION main\php_version.h`) do set BRANCH=%BRANCH%.%%i
+	)
+)

ext/mbstring/tests/utf_encodings.phpt

@@ -5,6 +5,7 @@ mbstring
 --SKIPIF--
 <?php
 if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+if (substr(PHP_OS, 0, 3) == 'WIN' && PHP_INT_SIZE === 4) die("skip not for Windows x86");
 ?>
 --FILE--
 <?php

ext/pdo_sqlite/tests/pdo_sqlite_open_basedir_uri.phpt

@@ -3,7 +3,7 @@ PDO_sqlite: Testing URIs with open_basedir
 --EXTENSIONS--
 pdo_sqlite
 --INI--
-open_basedir={TMP}
+open_basedir="{TMP}"
 --FILE--
 <?php
 

ext/zend_test/tests/observer_declarations_file_cache.phpt

@@ -6,7 +6,7 @@ zend_test
 zend_test.observer.enabled=1
 zend_test.observer.observe_declaring=1
 opcache.enable_cli=1
-opcache.file_cache={TMP}
+opcache.file_cache="{TMP}"
 opcache.file_cache_only=1
 --FILE--
 <?php