compile error

[fredchenbj]

when compile tikv branch master(6d60e7c)，compile error occurs:

--- stderr
/home/worker/.cargo/git/checkouts/rust-rocksdb-82ef6e5337b3fbe6/1317e2e/librocksdb_sys/rocksdb/utilities/titandb/options.cc: In member function ‘std::string rocksdb::titandb::TitanCFOptions::ToString() const’:
/home/worker/.cargo/git/checkouts/rust-rocksdb-82ef6e5337b3fbe6/1317e2e/librocksdb_sys/rocksdb/utilities/titandb/options.cc:14:50: error: expected ‘)’ before ‘PRIu64’
snprintf(buf, sizeof(buf), "min_blob_size = %" PRIu64 "\n", min_blob_size);
...
/home/worker/.cargo/git/checkouts/rust-rocksdb-82ef6e5337b3fbe6/1317e2e/librocksdb_sys/rocksdb/utilities/titandb/version_builder.cc: In member function ‘void rocksdb::titandb::VersionBuilder::Builder::AddFile(const std::shared_ptrrocksdb::titandb::BlobFileMeta&)’:
/home/worker/.cargo/git/checkouts/rust-rocksdb-82ef6e5337b3fbe6/1317e2e/librocksdb_sys/rocksdb/utilities/titandb/version_builder.cc:14:35: error: expected ‘)’ before ‘PRIu64’
fprintf(stderr, "blob file %" PRIu64 " has been added before\n", number);

Then, I modify two files: librocksdb_sys/rocksdb/utilities/titandb/options.cc and librocksdb_sys/rocksdb/utilities/titandb/version_builder.cc, add Macro #define __STDC_FORMAT_MACROS before #include <inttypes.h>, it works.

Compile environment is below:

• kernel: 3.10.0-693.1.1.el7.x86_64
• linux: CentOS Linux release 7.2.1511 (Core)
• gcc: gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-11)

[DorianZheng]

@fredchenbj Thanks for the issue. I've filed a PR to fix it.
#265