Updated test_feature cmake config

Looks it wasn't touched since some time, so here's up-to-date version; would be nice to have it in upstream.

For svn r2649 / git sha b9a40739c9d6709b5d4568faf7a78cc47950e9b4 (codecat mirror)

Whole file https://fodev.net/pastebin/?u=as-test-feature-full​

Diff only https://fodev.net/pastebin/?u=as-test-feature-diff​

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PS: test_float fails on my setup; 32bit Windows with G++ (MinGW)

AngelScript version: 2.35.0 WIP
AngelScript options:  AS_WIN AS_X86

...

--- Assert failed ---
func: void ExecuteString()
mdle: (null)
sect: ExecuteString
line: 9
---------------------
Failed on line 146 in C:\...\AngelScript\sdk\tests\test_feature\source\test_float.cpp
--------------------------------------------
One of the tests failed, see details above.