Update provision scripts to use CMake 3.6.1 and download the package on Linux.

build/scripts/Provision.lua

@@ -37,7 +37,7 @@ function download_cmake()
 		error("Error downloading CMake for unknown system")
 	end
 
-	local url = "https://cmake.org/files/v3.6/cmake-3.6.0-" .. system
+	local url = "https://cmake.org/files/v3.6/cmake-3.6.1-" .. system
 	local file = "cmake" .. path.getextension(system)
 
 	if not os.isfile(file) then
@@ -63,10 +63,6 @@ function provision_linux()
 	sudo("apt-key adv --keyserver http://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF")
 	sudo("echo \"deb http://download.mono-project.com/repo/debian wheezy main\" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list")
 
-	if is_vagrant() then
-	 sudo("add-apt-repository -y ppa:george-edison55/cmake-3.x")
-	end
-
 	sudo("apt-get update")
 
 	-- Build tools
@@ -77,7 +73,8 @@ function provision_linux()
 
 	-- LLVM/Clang build tools
 	if compile_llvm then
-		sudo("apt-get install -y cmake ninja-build")
+		sudo("apt-get install -y ninja-build")
+		download_cmake()
 	end
 end
 
@@ -96,6 +93,11 @@ function provision_osx()
   	download_cmake()
 end
 
+if _ACTION == "cmake" then
+	download_cmake()
+	os.exit()
+end
+
 if _ACTION == "provision" then
   if os.is("linux") then
   	provision_linux()