use fb303 repo in open source build

Summary: Add a dependency from the eden open source build to the fb303 open source build and switch EdenServiceHandler to BaseService.

Reviewed By: simpkins

Differential Revision: D15528156

fbshipit-source-id: 2ca5c31dd9fcc9bac43fd399b27f33b6f2c5ebfc

build/fbcode_builder/manifests/eden

@@ -14,6 +14,7 @@ builder = cmake
 googletest
 folly
 fbthrift
+fb303
 cpptoml
 rocksdb
 libgit2

build/fbcode_builder/manifests/watchman

@@ -12,8 +12,9 @@ builder = cmake
 
 [dependencies]
 boost
-folly
+fb303
 fbthrift
+folly
 pcre
 
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