Fix v8_torque_generated failing to build on Windows (#82)

The torque-outputs and torque_outputs variables can have too many
characters on Windows to be executed on the command line, so we have to
write it to a temporary file and execute that.

Fixes: #42
Fixes: #67

CMakeLists.txt

@@ -999,14 +999,20 @@ target_include_directories(v8_torque_generated
     ${PROJECT_SOURCE_DIR}/v8
 )
 
+# The torque-outputs and torque_outputs variables can have too many characters
+# on Windows to be executed on the command line, so we have to write it to a
+# temporary file and execute that 
+file(WRITE "${PROJECT_BINARY_DIR}/touch_torque_outputs.cmake"
+           "file(TOUCH ${torque-outputs};${torque_outputs})")
+
 add_custom_command(
   COMMAND
     torque
     -o ${PROJECT_BINARY_DIR}/torque-generated
     -v8-root ${PROJECT_SOURCE_DIR}/v8
     ${torque_files}
   COMMAND
-    ${CMAKE_COMMAND} -E touch ${torque-outputs} ${torque_outputs}
+    ${CMAKE_COMMAND} -P ${PROJECT_BINARY_DIR}/touch_torque_outputs.cmake
   DEPENDS
     torque
     ${torque_dirs}