Compiled shaders cache bug

[RblSb]

Someway this error can happen after running node Kha/make html5, at least with custom shader and project.addShaders('myshaders'). Removing build folder fixes it.

Compiling shader 3 of 4 (painter-mask.frag-glsl).
 Error: ENOENT: no such file or directory, rename 'build\html5-resources\painter-mask.frag.essl.temp' -> "build\html5-resources\painter-mask.frag.essl'