android-ndk: add descriptor.pb.h .

.gitignore 에서 pb.h 파일을 무시하도록 설정하고 있어서
기존 커밋에서 빠져있었음.

Change-Id: I4089801bdc9ae0217cab0d99e4a180a80da751f2
cpp client: minor rename: *.cpp -> *.cc

Change-Id: I2e1c754c306fdbc405416b91b2a49dea77c26c42
cpp client: minor rename: funapi_client/ -> funapi/

Change-Id: I994dbdc55bb36d7dba1f404ba9d26bb911818556
cpp client: move account_messages.proto: funapi -> funapi/account

Change-Id: I84e6e2793f53148932b1dbc57f4d4c2b6866323c
cpp client: app_messages_for_client.proto -> app_messages.proto

Change-Id: I0bbb681e225b1c34851e7636c2add4fc0976d93a
cpp client: minor type fix.

Change-Id: I797ad93196ee40589b91fa5d93e95c70aee6b100
cpp client: create GivingTreeClientProtoc builder.

* Issue:1941

Change-Id: I29b3bbf09cdcbd8e0af009a51660200d96795d78
android-ndk: sync with cpp client.

Change-Id: I4d69931a994ddd1eab7c1542f37b2026b63a9e1b