ECS core imprevement

-Adedd function to resize array to Mallocator
-significant speed up for first time ID allocation by using resizeArray instead of makeArray
-fix: onUpdate called with zero length arrays
-call updateBlocks before updateEvents (it's more accurate behaviour)
-some minore fixes
-fixed meson.build for GDC

meson.build

@@ -52,8 +52,8 @@ endif
 
 if betterC_opt
 	if comp_id == 'gcc'
-		args += ['-flto','-fno-druntime']
-		link_args += ['-flto','-fno-druntime']
+		args += ['-fno-druntime']
+		link_args += ['-fno-druntime']
 	else 
 		args += '-betterC'
 		link_args += '-betterC'