[dev.cc] build: skip API checks on Windows too (not just Unix)

TBR=brainman
CC=golang-codereviews
https://golang.org/cl/175490043

src/run.bat

@@ -134,9 +134,11 @@ if %FAIL%==1 goto fail
 set GOMAXPROCS=%OLDGOMAXPROCS%
 set OLDGOMAXPROCS=
 
-echo # Checking API compatibility.
-go run "%GOROOT%\src\cmd\api\run.go"
-if errorlevel 1 goto fail
+:: echo # Checking API compatibility.
+:: go run "%GOROOT%\src\cmd\api\run.go"
+:: if errorlevel 1 goto fail
+:: echo.
+echo # SKIPPING API COMPATIBILITY UNTIL ALL SYSTEMS BUILD.
 echo.
 
 echo ALL TESTS PASSED