ep-engine build is broken

Using the 2.1-stable manifest, ep-engine fails to build.

libtool: compile: g++ -DHAVE_CONFIG_H -I. -I./src -pipe -I./include -DHAVE_VISIBILITY=1 -fvisibility=hidden -I./src -I./include -I/tmp/couchbase/clean_2.0/install/include -pipe -O3 -MT src/ep_la-ep_extension.lo -MD -MP -MF src/.deps/ep_la-ep_extension.Tpo -c src/ep_extension.cc -fPIC -DPIC -o src/.libs/ep_la-ep_extension.o
src/ep_extension.cc: In member function 'void GetlExtension::initialize()':
src/ep_extension.cc:97:50: error: 'EXTENSION_ASCII_PROTOCOL' was not declared in this scope
make[2]: *** [src/ep_la-ep_extension.lo] Error 1
make[2]: Leaving directory `/tmp/couchbase/clean_2.0/ep-engine'
make[1]: *** [install] Error 2
make[1]: Leaving directory `/tmp/couchbase/clean_2.0/ep-engine'
make: *** [make-install-ep-engine] Error 2