[edk2-platforms: PATCH v2] Python run fail if env variable PYTHON_HOME is not set

["Cheng, Ching JenX" <ching.jenx.cheng@intel.com>]

BZ:https://bugzilla.tianocore.org/show_bug.cgi?id=2041

[PATCH v2] Update related files

In Platform\Intel\MinPlatformPkg\Tools\Fsp\RebaseFspBinBaseAddress.py
It will run another python code.
But if the environment variable "PYTHON_HOME" is not exist
and we didn't add any python's path to "PATH".
It will cause error because python command not found.

the error message as below:
'python' is not recognized as an internal or external command,
operable program or batch file.

So we set the python's path from which execute the python code
if PYTHON_HOME was not exist.

Cc: Amy Chan <amy.chan@intel.com>
Cc: Michael Kubacki <michael.a.kubacki@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Ching JenX Cheng <ching.jenx.cheng@intel.com>
---
 Platform/Intel/MinPlatformPkg/Tools/Fsp/RebaseFspBinBaseAddress.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Platform/Intel/MinPlatformPkg/Tools/Fsp/RebaseFspBinBaseAddress.py b/Platform/Intel/MinPlatformPkg/Tools/Fsp/RebaseFspBinBaseAddress.py
index a8165b08e6..fb4cf4f9b7 100644
--- a/Platform/Intel/MinPlatformPkg/Tools/Fsp/RebaseFspBinBaseAddress.py
+++ b/Platform/Intel/MinPlatformPkg/Tools/Fsp/RebaseFspBinBaseAddress.py
@@ -68,6 +68,8 @@ file.close()
 pythontool = 'python'
 if 'PYTHON_HOME' in os.environ:
     pythontool = os.environ['PYTHON_HOME'] + os.sep + 'python'
+else:
+    pythontool = sys.executable
 Process = subprocess.Popen([pythontool, splitFspBinPath, "info","-f",fspBinFilePath], stdout=subprocess.PIPE)
 Output = Process.communicate()[0]
 FsptInfo = Output.rsplit(b"FSP_M", 1);
-- 
2.21.0.windows.1