fix php5.6 ext location

src/php/bin/interop_client.sh

@@ -32,7 +32,7 @@
 set +e
 cd $(dirname $0)
 
-module_dir=`php --version | grep -q 'PHP 5.6' && echo '../ext/grpc' || echo '../ext/grpc/modules'`
+module_dir=../ext/grpc/modules
 
 php -d extension_dir=$module_dir -d extension=grpc.so \
   ../tests/interop/interop_client.php $@ 1>&2

src/php/bin/run_tests.sh

@@ -34,7 +34,7 @@ set -e
 cd $(dirname $0)
 default_extension_dir=`php -i | grep extension_dir | sed 's/.*=> //g'`
 
-module_dir=`php --version | grep -q 'PHP 5.6' && echo '../ext/grpc' || echo '../ext/grpc/modules'`
+module_dir=../ext/grpc/modules
 
 # sym-link in system supplied extensions
 for f in $default_extension_dir/*.so