Add luajit as a submodule and fix cmake/luajit.cmake

.gitmodules

+[submodule "third_party/luajit"]
+	path = third_party/luajit
+	url = http://luajit.org/git/luajit-2.0.git

cmake/luajit.cmake

@@ -152,9 +152,6 @@ macro(luajit_build)
         add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/third_party/luajit/src/libluajit.a
             WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/third_party/luajit
             COMMAND $(MAKE) clean
-            COMMAND $(MAKE) -C src -t buildvm_x86.h buildvm_arm.h
-                            buildvm_x64.h buildvm_x64win.h buildvm_ppc.h
-                            buildvm_ppcspe.h
             COMMAND $(MAKE) -C src ${luajit_buildoptions}
             DEPENDS ${CMAKE_SOURCE_DIR}/CMakeCache.txt
         )
@@ -166,9 +163,6 @@ macro(luajit_build)
             WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/third_party/luajit
             COMMAND cp -r ${PROJECT_SOURCE_DIR}/third_party/luajit/* .
             COMMAND $(MAKE) clean
-            COMMAND $(MAKE) -C src -t buildvm_x86.h buildvm_arm.h
-                            buildvm_x64.h buildvm_x64win.h buildvm_ppc.h
-                            buildvm_ppcspe.h
             COMMAND $(MAKE) -C src ${luajit_buildoptions}
             DEPENDS ${PROJECT_BINARY_DIR}/CMakeCache.txt ${PROJECT_BINARY_DIR}/third_party/luajit
         )

third_party/README

@@ -11,11 +11,8 @@ cvs up
 How to update luajit
 ====================
 
-- download the latest release source tarball
-- replace the contents of the luajit directory 
-with the contents of the tarball
-- merge the original Makefile and the Makefile
-from the new tarball.
+Run from project root dir:
+git submodule update --reference v2.0.1-fixed -- third_party/luajit
 
 How to update libobjc2
 ======================

luajit @ e7633dba

+Subproject commit e7633dba1e446763454a7969ce7e27139debc6cd