Fix typo keeping mega65 examples from being included

Author: mysterymath

examples/CMakeLists.txt

@@ -55,7 +55,7 @@ endif()
 if(PLATFORM MATCHES ^atari2600-)
   add_subdirectory(atari2600)
 endif()
-if(PLATFORM STREQUAL ^mega65)
+if(PLATFORM STREQUAL mega65)
   add_subdirectory(mega65)
 endif()
 if(PLATFORM STREQUAL neo6502)