Added MySQL connector

.gitmodules

@@ -55,3 +55,6 @@
 [submodule "third_party/protobuf"]
 	path = third_party/protobuf
 	url = https://github.com/google/protobuf.git
+[submodule "third_party/mysqlconnector"]
+	path = third_party/mysqlconnector
+	url = https://github.com/mysql/mysql-connector-cpp.git

third_party/build_mysqlconnector.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+source ../scripts/build_helper.sh
+
+library_path="mysqlconnector"
+requires_rebuild ${library_path}
+[[ $? -eq 0 ]] && exit 0
+
+cd ${library_path}
+HEADER=$(cat cdk/foundation/connection_openssl.cc)
+if ! [[ "${HEADER:0:34}" == "#if !defined(SSL_ERROR_WANT_ASYNC)" ]]; then
+	echo "Creating new one!"
+	echo "#if !defined(SSL_ERROR_WANT_ASYNC)
+	#define SSL_ERROR_WANT_ASYNC 0xFFEEDDCC
+#endif
+#if !defined(SSL_ERROR_WANT_ASYNC_JOB)
+	#define SSL_ERROR_WANT_ASYNC_JOB 0xFFEECCDD
+#endif
+`cat cdk/foundation/connection_openssl.cc`" > cdk/foundation/connection_openssl.cc
+fi
+cd ..
+
+cmake_build ${library_path} -DCMAKE_CXX_FLAGS="-static-libgcc -static-libstdc++ -I../../boringssl/include/" -DWITH_JDBC=ON -DWITH_SSL="`pwd`/../../boringssl/" -DOPENSSL_ROOT_DIR="`pwd`/../../boringssl/" -DCMAKE_BUILD_TYPE=RelWithDebInfo
+check_err_exit ${library_path} "Failed to build mysqlconnector!"
+set_build_successful ${library_path}

third_party/mysqlconnector

@@ -0,0 +1 @@
+Subproject commit 7abcdc88c8235f02096e21b5bcd72e8312508f61