Import grpcio 0.6.0

And add metadata files using the following command:
get_rust_pkg.py --add3prf -v grpcio-0.6.0 -o grpcio

Test: none
Change-Id: I53cc0feb5c9d24eacb62331b968cab4ec85f60a6

1 files changed, 68 insertions, 0 deletions

diff --git a/cross_compile.md b/cross_compile.md
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+# Cross Compile gRPC-rs(0.2.1) to Windows under *nix
+
+## First you need to install mingw
+
+```bash
+# macOS
+brew install mingw-w64
+
+# CentOS
+yum install mingw64-openssl-static mingw64-zlib-static mingw64-winpthreads-static
+```
+
+## Fix CMake
+
+```
+# modify grpc-rs/grpc-sys/build.rs
+# fix SYSTEM_PROCESSOR
+"CMAKE_SYSTEM_PROCESSOR", get_env("CARGO_CFG_TARGET_ARCH").unwrap()
+# fix try_run
+"CMAKE_CROSSCOMPILING", "true"
+```
+
+### All diff in `fn build_grpc`
+
+```rust
+    let dst = {
+        let mut config = Config::new("grpc");
+        if get_env("CARGO_CFG_TARGET_OS").map_or(false, |s| s == "macos") {
+            config.cxxflag("-stdlib=libc++");
+        }
+        config
+            .define("CMAKE_SYSTEM_PROCESSOR", get_env("CARGO_CFG_TARGET_ARCH").unwrap())
+            .define("CMAKE_CROSSCOMPILING", "true")
+            .build_target(library)
+            .uses_cxx11()
+            .build()
+        // config.build_target(library).uses_cxx11().build()
+    };
+```
+
+### Fix find zlib
+
+```rust
+    // try these values
+    let mut zlib = "z";
+    let mut zlib = "zlibstatic";
+    let mut zlib = "zlibstaticd";
+```
+
+## Fix WIN32 API
+
+```
+# grpc-rs/grpc-sys/grpc/CMakeLists.txt
+# add these code after about line number 295
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_WIN32_WINNT=0x600")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_WIN32_WINNT=0x600")
+set(C_CXX_FLAGS "${C_CXX_FLAGS} -D_WIN32_WINNT=0x600")
+```
+
+## Fix boringssl
+
+Just update third_party/boringssl
+
+```bash
+cd third_party/boringssl
+git checkout master
+git pull
+```