UefiCpuPkg: ResetVector Tool additional debug prints

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3506

Before executing the nasm command, added print statement to know what
commands are executing.
before printing the output file need check the status of command which
is executed. if the status is 0 then only print the output file name.

Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Debkumar De <debkumar.de@intel.com>
Cc: Harry Han <harry.han@intel.com>
Cc: Catharine West <catharine.west@intel.com>
Cc: Sangeetha V <sangeetha.v@intel.com>
Signed-off-by: Ashraf Ali S <ashraf.ali.s@intel.com>

UefiCpuPkg/ResetVector/Vtf0/Build.py

@@ -32,9 +32,12 @@ for arch in ('ia32', 'x64'):
             '-o', output,
             'Vtf0.nasmb',
             )
+        print(f"Command : {' '.join(commandLine)}")
         ret = RunCommand(commandLine)
+        if ret != 0:
+            print(f"something went wrong while executing {commandLine[-1]}")
+            sys.exit()
         print('\tASM\t' + output)
-        if ret != 0: sys.exit(ret)
 
         commandLine = (
             'python',