Linux Makefile project is not building from MSBuild (builds fine from Visual Studio)

### Issue Description
Linux Makefile project is not building from MSBuild (builds fine from Visual Studio)

### Steps to Reproduce
In Visual Studio add a remote connection (Tools > Options > Cross Platform > Connection Manager > Add)
In Visual Studio create a new "Makefile project"
Rename it to "myprog"

Add file `main.cpp` like this

```cpp
#include "stdio.h"
int main()
{
printf("Hello");
return 0;
}
```

Add file `makefile` (no extension) like this (note, it needs real tabs, not replaced by spaces, otherwise you'd get "*** missing separator")

```
src = $(wildcard *.cpp)
obj = $(src:.c=.o)
x64/Debug/myprog: $(obj)
$(CC) -o $@ $^ $(LDFLAGS)
.PHONY: clean
clean:
rm -f $(obj) x64/Debug
```

In Project Propertied > Remote Build specify:
Build Command Line: make
Outputs: $(Platform)/$(Configuration)/myprog

Make sure project builds from Visual Studio
Delete `bin` and `obj` files from the project folder
Open "Developer Command Prompt for VS 2019", change current folder to the project folder, run the following command :

```
msbuild /property:Configuration=Debug /property:Platform=x64 /verbosity:normal .\myprog.vcxproj
```

It fails. Note, if the folder `obj\x64\Debug` exists (even empty), it works.

### Expected Behavior
Should build

### Actual Behavior
You will get the following output:

```
>msbuild /property:Configuration=Debug /property:Platform=x64 /verbosity:normal .\myproj.vcxproj
Microsoft (R) Build Engine version 16.8.1+bd2ea1e3c for .NET Framework
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 17/11/2020 10:33:00 AM.
Project "C:\myproj\myproj.vcxproj" on node 1 (default targets).
_ValidateSources:
Validating sources
_CopySources:
Copying sources remotely to '*****'
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Microsoft\VC\v160\Application Type\Linux\1.0\Lin
ux.Makefile.Targets(261,5): error : Exception occured while copying sources to remote machine - Could not find a part o
f the path 'C:\myproj\obj\x64\Debug\1085594582.Local_Remote_PathMapping.tlog'. [C
:\Users\andreyb\source\repos\Project4\Project4\myproj.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Microsoft\VC\v160\Application Type\Linux\1.0\Lin
ux.Makefile.Targets(261,5): error : Could not find a part of the path 'C:\myproj\
obj\x64\Debug\1085594582.CopySourcesUpToDateFile.tlog'. [C:\myproj\myproj.vcxproj
]
Done Building Project "C:\myproj\myproj.vcxproj" (default targets) -- FAILED.

Build FAILED.

"C:\myproj\myproj.vcxproj" (default target) (1) ->
(_CopySources target) ->
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Microsoft\VC\v160\Application Type\Linux\1.0\L
inux.Makefile.Targets(261,5): error : Exception occured while copying sources to remote machine - Could not find a part
of the path 'C:\myproj\obj\x64\Debug\1085594582.Local_Remote_PathMapping.tlog'.
[C:\myproj\myproj.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Microsoft\VC\v160\Application Type\Linux\1.0\L
inux.Makefile.Targets(261,5): error : Could not find a part of the path 'C:\Users\andreyb\source\repos\Project4\Project
4\obj\x64\Debug\1085594582.CopySourcesUpToDateFile.tlog'. [C:\myproj\myproj.vcxpr
oj]

0 Warning(s)
2 Error(s)

Time Elapsed 00:00:01.87
```

### Analysis
If I add the following workaround (modify project file), it starts to work:
```xml



```

### Versions & Configurations
Microsoft (R) Build Engine version 16.8.1+bd2ea1e3c for .NET Framework
Copyright (C) Microsoft Corporation. All rights reserved.

16.8.1.52902