switch to using the PythonRoot parameter

Author: charles-zablit

platforms/Windows/python/asserts/python.wxs

@@ -5,7 +5,7 @@
   <?define VariantCabinetName = python.asserts.cab?>
   <?define ToolchainVersionedVariantDirectory = ToolchainVersionedAsserts ?>
   <?define VariantEnvironmentComponentGUID = 30629e0c-b376-47bc-bedf-fefb7d4ca61d?>
-  <?define PythonRoot = "$(ImageRoot)\Python"?>
+  <?define PythonRoot = "$(PythonRoot)"?>
 
   <?include ../python.wxi ?>
 </Wix>

platforms/Windows/readme.md

@@ -178,6 +178,7 @@ To support the three architecture flavors of the SDK and RTL MSI packages, you n
 | MSBuild property | Description |
 | ---------------- | ----------- |
 | ImageRoot | Path to the root of the installed Swift image to package |
+| PythonRoot | Path to the root of the Python distribution to package |
 | Platforms | Semicolon delimited list of platforms to package (android;windows) |
 | AndroidArchitectures | Semicolon delimited list of architectures the Android platform supports (aarch54;armv7;i686;x86_64) |
 | ToolchainVariants | Semicolon delimited list of toolchain variants to package (assert;noassert) |
@@ -195,10 +196,11 @@ msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\bundle\installer.
   -p:Configuration=Release ^
   -p:BaseOutputPath=%PackageRoot%\online\ ^
   -p:ImageRoot=%ImageRoot%\Program Files\Swift ^
+  -p:PythonRoot=%ImageRoot%\Program Files\Python-3.10.1 ^
   -p:Platforms="android;windows" ^
   -p:AndroidArchitectures="aarch64;armv7;i686;x86_64" ^
   -p:WindowsArchitectures="aarch64;i686;x86_64" ^
-  -p:WindowsRuntimeARM64=%ImageRoot%\Prograam Files (Arm64)\Swift\Runtimes\0.0.0 ^
+  -p:WindowsRuntimeARM64=%ImageRoot%\Program Files (Arm64)\Swift\Runtimes\0.0.0 ^
   -p:WindowsRuntimeX64=%ImageRoot%\Program Files\Swift\Runtimes\0.0.0 ^
   -p:WindowsRuntimeX86=%ImageRoot%\Program Files (x86)\Swift\Runtimes\0.0.0
 ```