run the webtry build script instead of using go build

BUG=skia:
R=jcgregorio@google.com

Author: humper@google.com

Review URL: https://codereview.chromium.org/601203002
diff --git a/experimental/webtry/setup/continue_install b/experimental/webtry/setup/continue_install
index 1959ee7..405d0dc 100755
--- a/experimental/webtry/setup/continue_install
+++ b/experimental/webtry/setup/continue_install
@@ -53,9 +53,9 @@
 # git apply $PATCH
 
 GYP_GENERATORS=ninja ./gyp_skia gyp/webtry.gyp gyp/most.gyp -Dskia_gpu=0
-ninja -C out/Debug webtry
+ninja -C out/Release webtry
 
 cd experimental/webtry
 
 go get -d
-go build webtry.go
+./build
\ No newline at end of file