Fix workspace php56 build fail (#2012)

* check swoole extenstion after install.
* php 5.6 install swoole-2.0.11 downgrade version to 2.0.10 avoid segmentation fault.

php-fpm/Dockerfile

@@ -206,7 +206,7 @@ ARG INSTALL_SWOOLE=false
 RUN if [ ${INSTALL_SWOOLE} = true ]; then \
     # Install Php Swoole Extension
     if [ $(php -r "echo PHP_MAJOR_VERSION;") = "5" ]; then \
-      pecl install swoole-2.0.11; \
+      pecl install swoole-2.0.10; \
     else \
       if [ $(php -r "echo PHP_MINOR_VERSION;") = "0" ]; then \
         pecl install swoole-2.2.0; \
@@ -215,6 +215,7 @@ RUN if [ ${INSTALL_SWOOLE} = true ]; then \
       fi \
     fi && \
     docker-php-ext-enable swoole \
+    && php -m | grep -q 'swoole' \
 ;fi
 
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workspace/Dockerfile

@@ -406,7 +406,7 @@ ARG INSTALL_SWOOLE=false
 RUN if [ ${INSTALL_SWOOLE} = true ]; then \
     # Install Php Swoole Extension
     if [ $(php -r "echo PHP_MAJOR_VERSION;") = "5" ]; then \
-      pecl -q install swoole-2.0.11; \
+      pecl -q install swoole-2.0.10; \
     else \
       if [ $(php -r "echo PHP_MINOR_VERSION;") = "0" ]; then \
         pecl install swoole-2.2.0; \
@@ -416,6 +416,7 @@ RUN if [ ${INSTALL_SWOOLE} = true ]; then \
     fi && \
     echo "extension=swoole.so" >> /etc/php/${LARADOCK_PHP_VERSION}/mods-available/swoole.ini && \
     ln -s /etc/php/${LARADOCK_PHP_VERSION}/mods-available/swoole.ini /etc/php/${LARADOCK_PHP_VERSION}/cli/conf.d/20-swoole.ini \
+    && php -m | grep -q 'swoole' \
 ;fi
 
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