Bump version to 10.5.12.0

Author: ivanimanishi

SConstruct

@@ -56,7 +56,7 @@ SConsignFile()
 
 ieCoreMilestoneVersion = 10 # for announcing major milestones - may contain all of the below
 ieCoreMajorVersion = 5 # backwards-incompatible changes
-ieCoreMinorVersion = 11 # new backwards-compatible features
+ieCoreMinorVersion = 12 # new backwards-compatible features
 ieCorePatchVersion = 0 # bug fixes
 ieCoreVersionSuffix = "" # used for alpha/beta releases. Example: "a1", "b2", etc.