cmake: do not use space in compiler string definition, it is not compatible with the standalone MinGW for Windows

Author: illwieckz

cmake/DaemonCompiler.cmake

@@ -225,7 +225,7 @@ foreach(lang C;CXX)
 	endif()
 
 	set(DAEMON_${lang}_COMPILER_STRING
-		"${DAEMON_${lang}_COMPILER_NAME} ${DAEMON_${lang}_COMPILER_EXTENDED_VERSION} ${DAEMON_${lang}_COMPILER_BASENAME}")
+		"${DAEMON_${lang}_COMPILER_NAME}_${DAEMON_${lang}_COMPILER_EXTENDED_VERSION}:${DAEMON_${lang}_COMPILER_BASENAME}")
 
 	message(STATUS "Detected ${${lang}_NAME} compiler: ${DAEMON_${lang}_COMPILER_STRING}")