* Create ParseConfigHeader.cmake

This script parses the config.h file to automate the process of exposing the configuration flags and configuration values found in the latter.

* Update CompileDefinitions.cmake

Makes use of the new functionality found in ParseConfigHeader.cmake to make things consistent.

* Update CMakeOptions.txt

Makes use of the new functionality found in ParseConfigHeader.cmake to make things consistent.

* Update CMakeLists.txt

Changes required to make possible building raylib for web on Windows 10.

* Update LibraryConfigurations.cmake

Removes a warning that linker-only flags were being passed to the compiler, which is in accordance to https://emscripten.org/docs/tools_reference/settings_reference.html.

* Update CMakeOptions.txt

Removed clutter.

* Update CompileDefinitions.cmake

Removed clutter.

* Update CompileDefinitions.cmake

Some applications might check for PLATFORM_WEB instead of __EMSCRIPTEN__.

* Update CompileDefinitions.cmake

Reverting

* Update CMakeLists.txt

USE_AUDIO is redundant in the presence of the already existent and more descriptive SUPPORT_MODULE_RAUDIO.

* Update CompileDefinitions.cmake

USE_AUDIO is redundant in the presence of the already existent and more descriptive SUPPORT_MODULE_RAUDIO.

* Update ParseConfigHeader.cmake

* Revert "Update CMakeLists.txt"

This reverts commit 1785fc06b5.

* Revert "Update CompileDefinitions.cmake"

This reverts commit 62f9a3a0ea.

* Revert "Update CMakeLists.txt"

This reverts commit 3e7912144e.

* Revert "Update LibraryConfigurations.cmake"

This reverts commit bcc4310c49.