调整测试用文件结构

tests/conf/apc.ini

@@ -1 +0,0 @@
-apc.enable_cli=1

tests/conf/apcu.ini

@@ -0,0 +1,3 @@
+extension=apcu.so
+
+apc.enable_cli=1

tests/conf/apcu_bc.ini

@@ -1,2 +1,4 @@
 extension=apcu.so
 extension=apc.so
+
+apc.enable_cli=1

tests/script/install.sh

@@ -3,17 +3,17 @@
 if [ $(phpenv version-name) != "hhvm" ]; then
     pecl channel-update pecl.php.net
 
+    pear config-set php_ini ''
+    pecl config-set php_ini ''
+
     if [ $(phpenv version-name) = "7.0" ]; then
-        pear config-set php_ini ''
-        pecl config-set php_ini ''
         echo "yes\nno\n" | pecl install apcu-5.1.2
         pecl install apcu_bc-beta
         phpenv config-add thinkphp/tests/conf/apcu_bc.ini
     else
         echo "yes\nno\n" | pecl install apcu-4.0.10
+        phpenv config-add thinkphp/tests/conf/apcu.ini
     fi
-
-    phpenv config-add thinkphp/tests/conf/apc.ini
 fi
 
 composer install --no-interaction --ignore-platform-reqs