Added sgx enable

.gitmodules

@@ -10,3 +10,9 @@
 [submodule "leveldb"]
 	path = leveldb
 	url = https://github.com/google/leveldb.git
+[submodule "linux-sgx-driver"]
+	path = linux-sgx-driver
+	url = https://github.com/intel/linux-sgx-driver.git
+[submodule "sgx-software-enable"]
+	path = sgx-software-enable
+	url = https://github.com/intel/sgx-software-enable

linux-sgx-driver @ a62f3114

+Subproject commit a62f3114718ccd5e16ba01d5bf3e89877c41c8f8

scripts/install_driver.sh

+sudo mkdir -p "/lib/modules/"`uname -r`"/kernel/drivers/intel/sgx"    
+sudo cp ../linux-sgx-driver/isgx.ko "/lib/modules/"`uname -r`"/kernel/drivers/intel/sgx"    
+sudo sh -c "cat /etc/modules | grep -Fxq isgx || echo isgx >> /etc/modules"    
+sudo /sbin/depmod
+sudo /sbin/modprobe isgx

sgx-software-enable @ 8c8f69d4

+Subproject commit 8c8f69d40f89d80d52e4061dce10bb772bdd2fd1