Update instructions for Windows x64 build.

docs/building-msvc-x64.md

@@ -33,7 +33,7 @@ Open **x64 Native Tools Command Prompt for VS 2019.bat**, go to ***BuildPath***
     cd ThirdParty
     git clone https://github.com/desktop-app/patches.git
     cd patches
-    git checkout 9fb66f2
+    git checkout 41ead72
     cd ../
     git clone https://chromium.googlesource.com/external/gyp
     cd gyp
@@ -63,7 +63,7 @@ Open **x64 Native Tools Command Prompt for VS 2019.bat**, go to ***BuildPath***
 
     git clone https://github.com/desktop-app/patches.git
     cd patches
-    git checkout 9fb66f2
+    git checkout 41ead72
     cd ..
 
     git clone https://github.com/desktop-app/lzma.git
@@ -108,9 +108,9 @@ Open **x64 Native Tools Command Prompt for VS 2019.bat**, go to ***BuildPath***
     cmake --build . --config Release
     cd ..
 
-    git clone https://github.com/telegramdesktop/openal-soft.git
+    git clone https://github.com/kcat/openal-soft.git
     cd openal-soft
-    git checkout fix_mono
+    git checkout openal-soft-1.21.0
     cd build
     cmake .. ^
         -G "Visual Studio 16 2019" ^
@@ -161,17 +161,17 @@ Open **x64 Native Tools Command Prompt for VS 2019.bat**, go to ***BuildPath***
     cd ..
 
     SET LibrariesPath=%cd%
-    git clone git://code.qt.io/qt/qt5.git qt_5_15_1
-    cd qt_5_15_1
+    git clone git://code.qt.io/qt/qt5.git qt_5_15_2
+    cd qt_5_15_2
     perl init-repository --module-subset=qtbase,qtimageformats
-    git checkout v5.15.1
+    git checkout v5.15.2
     git submodule update qtbase qtimageformats
     cd qtbase
-    for /r %i in (..\..\patches\qtbase_5_15_1\*) do git apply %i
+    for /r %i in (..\..\patches\qtbase_5_15_2\*) do git apply %i
     cd ..
 
     configure ^
-        -prefix "%LibrariesPath%\Qt-5.15.1" ^
+        -prefix "%LibrariesPath%\Qt-5.15.2" ^
         -debug-and-release ^
         -force-debug-info ^
         -opensource ^