fix php7 swoole build failed

php-fpm/Dockerfile

@@ -322,6 +322,8 @@ RUN set -eux; \
         pecl install swoole-4.3.5; \
       elif [ $(php -r "echo PHP_VERSION_ID - PHP_RELEASE_VERSION;") = "70100" ]; then \
         pecl install swoole-4.5.11; \
+      elif [ $(php -r "echo PHP_MAJOR_VERSION;") = "7" ]; then \
+        pecl install swoole-4.8.12; \
       else \
         pecl install swoole; \
       fi; \

php-worker/Dockerfile

@@ -355,6 +355,8 @@ RUN set -eux; \
       pecl install swoole-4.3.5; \
     elif [ $(php -r "echo PHP_VERSION_ID - PHP_RELEASE_VERSION;") = "70100" ]; then \
       pecl install swoole-4.5.11; \
+    elif [ $(php -r "echo PHP_MAJOR_VERSION;") = "7" ]; then \
+      pecl install swoole-4.8.12; \
     else \
       pecl install swoole; \
     fi; \

workspace/Dockerfile

@@ -550,6 +550,8 @@ RUN set -eux; \
         echo '' | pecl -q install swoole-4.3.5; \
       elif [ $(php -r "echo PHP_MAJOR_VERSION;") = "7" ] && [ $(php -r "echo PHP_MINOR_VERSION;") = "1" ]; then \
         echo '' | pecl -q install swoole-4.5.11; \
+      elif [ $(php -r "echo PHP_MAJOR_VERSION;") = "7" ]; then \
+        echo '' | pecl -q install swoole-4.8.12; \
       else \
         echo '' | pecl -q install swoole; \
       fi; \