Merge pull request #218 from murgatroid99/electron_1.8_backport

Adding electron 1.8 support.

Author: murgatroid99

packages/grpc-native-core/tools/run_tests/artifacts/build_artifact_node.bat

@@ -16,7 +16,7 @@ set arch_list=ia32 x64
 
 set node_versions=4.0.0 5.0.0 6.0.0 7.0.0 8.0.0 9.0.0
 
-set electron_versions=1.0.0 1.1.0 1.2.0 1.3.0 1.4.0 1.5.0 1.6.0 1.7.0
+set electron_versions=1.0.0 1.1.0 1.2.0 1.3.0 1.4.0 1.5.0 1.6.0 1.7.0 1.8.0
 
 set PATH=%PATH%;C:\Program Files\nodejs\;%APPDATA%\npm
 

packages/grpc-native-core/tools/run_tests/artifacts/build_artifact_node.sh

@@ -18,7 +18,7 @@ set -ex
 
 arch_list=( ia32 x64 )
 node_versions=( 4.0.0 5.0.0 6.0.0 7.0.0 8.0.0 9.0.0 )
-electron_versions=( 1.0.0 1.1.0 1.2.0 1.3.0 1.4.0 1.5.0 1.6.0 1.7.0 )
+electron_versions=( 1.0.0 1.1.0 1.2.0 1.3.0 1.4.0 1.5.0 1.6.0 1.7.0 1.8.0 )
 
 while true ; do
   case $1 in