Move buildroot to bsp directory.

bsp/buildroot/package/php/php-fpm.conf

@@ -0,0 +1,14 @@
+[www]
+# Only start children when there are requests to be processed
+pm = ondemand
+# Terminate them again after there haven't been any for 2 minutes
+pm.process_idle_timeout = 120s
+# Maximum number of children processing PHP requests concurrently
+pm.max_children = 5
+
+listen = /var/run/php-fpm.sock
+listen.owner = www-data
+listen.group = www-data
+user = www-data
+group = www-data
+