build error when compiling 2.3.3 tarball

[Uwe Stöhr]

When compiling the LyX 2.3.3 tarball, I get this compilation error:

   D:\LyXGit\LyX23\development\cmake\lyx.rc(1): error RC2135: file not
found: lyx.ico [D:\LyXGit\LyX23\compile-2017\src\tex2lyx\tex2lyx.vcxproj]

I just pushed a fix to the 2.3 branch

regards Uwe