create a valgrind.include, and include it in php and php7 docker images

templates/tools/dockerfile/test/php7_jessie_x64/Dockerfile.template

@@ -19,6 +19,7 @@
   <%include file="../../php7_deps.include"/>
   <%include file="../../gcp_api_libraries.include"/>
   <%include file="../../python_deps.include"/>
+  <%include file="../../valgrind.include"/>
   <%include file="../../run_tests_addons.include"/>
   # Define the default command.
   CMD ["bash"]

templates/tools/dockerfile/test/php_jessie_x64/Dockerfile.template

@@ -20,6 +20,7 @@
   <%include file="../../gcp_api_libraries.include"/>
   <%include file="../../python_deps.include"/>
   <%include file="../../php_deps.include"/>
+  <%include file="../../valgrind.include"/>
   <%include file="../../run_tests_addons.include"/>
   # Define the default command.
   CMD ["bash"]

templates/tools/dockerfile/valgrind.include

@@ -0,0 +1,8 @@
+#=================
+# PHP dependencies
+
+# Install dependencies
+
+RUN apt-get update && apt-get install -y ${'\\'}
+    valgrind
+    

tools/dockerfile/test/php7_jessie_x64/Dockerfile

@@ -79,6 +79,14 @@ RUN pip install --upgrade pip==10.0.1
 RUN pip install virtualenv
 RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.5.2.post1 six==1.10.0 twisted==17.5.0
 
+#=================
+# PHP dependencies
+
+# Install dependencies
+
+RUN apt-get update && apt-get install -y \
+    valgrind
+    
 
 RUN mkdir /var/local/jenkins
 

tools/dockerfile/test/php_jessie_x64/Dockerfile

@@ -76,6 +76,14 @@ RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.5.2.post1 six==1.10.0 t
 RUN apt-get update && apt-get install -y \
     git php5 php5-dev phpunit unzip
 
+#=================
+# PHP dependencies
+
+# Install dependencies
+
+RUN apt-get update && apt-get install -y \
+    valgrind
+    
 
 RUN mkdir /var/local/jenkins