vprocss: Add xsct tck script to automate sdk project creation

xsct scipt file added to automate the process of generating the
elf file(s) from the provided hdf file

Signed-off-by: Rohit Consul <rohit.consul@xilinx.com>
Acked-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>

XilinxProcessorIPLib/drivers/vprocss/examples/readme.txt

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+vpss_example.tcl automates the process of generating the downloadable bit & elf files from the provided vpss example hdf file.
+
+Example application design source files (contained within "examples/src" folder) are tightly coupled with the video processing subsystem example design available in Vivado Catalogue.
+To run the provided tcl
+  1. Copy the exported example design hdf file in the "examples" directory of the driver
+     (a) Default hdf name is "design_1_v_proc_ss_0_0_design_synth_wrapper.hdf". If generated hdf name is different then vpss_example.tcl needs to be updated with the new name
+  2. Launch the xsct terminal
+  3. cd into the examples directory
+  4. run the tcl
+       xsct%>source vpss_example.tcl
+
+Script will perform following operations
+  1. Create workspace
+  2. Create HW project
+  3. Create BSP
+  4. Create Application Project
+  5. Build BSP and Application Project
+
+After the process is complete required files will be available in
+  bit file -> vpss_example.sdk/vpss_example_hw_platform folder
+  elf file -> vpss_example.sdk/vpss_example_design/{Debug/Release} folder
+
+When executed on the board the example application will determine the video processing subsystem topology set the input and output stream configuration accordingly. Test pattern generator IP is used to generated the input stream. Video Lock Monitor IP will then monitor the output of the subsystem (to vidout) to determine if lock is achieved and present the status on the terminal
+
+Note: Serial terminal baud rate should be set to 9600

XilinxProcessorIPLib/drivers/vprocss/examples/vpss_example.tcl

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+#set workspace
+puts "Create Workspace"
+sdk set_workspace vpss_example.sdk
+
+#create hw project
+puts "Create HW Project"
+sdk create_hw_project -name vpss_example_hw_platform -hwspec ./design_1_v_proc_ss_0_0_design_synth_wrapper.hdf
+
+#create bsp
+puts "Create BSP"
+sdk create_bsp_project -name vpss_example_bsp -hwproject vpss_example_hw_platform -proc microblaze_ss_microblaze_0 -os standalone
+
+#create application project
+puts "Create Application Project"
+sdk create_app_project -name vpss_example_design -hwproject vpss_example_hw_platform -proc microblaze_ss_microblaze_0 -os standalone -lang C -app {Empty Application} -bsp vpss_example_bsp
+
+#copy example source files tp app project
+puts "Get Example Design Source Files"
+sdk import_sources -name vpss_example_design -path ./src
+
+#build project
+puts "Build Project"
+sdk build_project -type all