cmake: minor rewording

Author: illwieckz

cmake/DaemonFlags.cmake

@@ -212,7 +212,7 @@ else()
 		# complain that the compiler doesn't support 'long long'.
 		try_c_flag(GNU99 "-std=gnu99")
 		if (NOT FLAG_GNU99)
-			message(FATAL_ERROR "GNU99 or C99 not supported by compiler")
+			message(FATAL_ERROR "GNU99 is not supported by the compiler")
 		endif()
 	endif()
 
@@ -226,7 +226,7 @@ else()
 		if (NOT FLAG_GNUXX14)
 			try_cxx_flag(GNUXX1Y "-std=gnu++1y")
 			if (NOT FLAG_GNUXX1Y)
-				message(FATAL_ERROR "GNU++14 or C++14 not supported by compiler")
+				message(FATAL_ERROR "GNU++14 is not supported by the compiler")
 			endif()
 		endif()
 	endif()