help bazel find VS when more than one VS is present

Author: msarahan

tensorflow-base-cpu/bld.bat

@@ -25,5 +25,7 @@ FOR /F "delims=" %%i IN ('cygpath.exe -u "%SYSTEMDRIVE%\t"') DO set "TMPDIR=%%i"
 set MSYSTEM=MINGW%ARCH%
 set MSYS2_PATH_TYPE=inherit
 set CHERE_INVOKING=1
+set "BAZEL_VC=%VSINSTALLDIR%VC"
+set "BAZEL_VS=%VSINSTALLDIR%"
 bash -lc "%RECIPE_DIR%"/build_win.sh
 if errorlevel 1 exit 1

tensorflow-base-gpu/bld.bat

@@ -25,5 +25,7 @@ FOR /F "delims=" %%i IN ('cygpath.exe -u "%SYSTEMDRIVE%\t"') DO set "TMPDIR=%%i"
 set MSYSTEM=MINGW%ARCH%
 set MSYS2_PATH_TYPE=inherit
 set CHERE_INVOKING=1
+set "BAZEL_VC=%VSINSTALLDIR%VC"
+set "BAZEL_VS=%VSINSTALLDIR%"
 bash -lc "%RECIPE_DIR%"/build_win.sh
 if errorlevel 1 exit 1