ToolDefinitionFile is generated by PlatformAutoGen.ToolDefinition()
Code assume ToolDefinition is always called before using
ToolDefinitionFile, but in some cases, it's not true.
This patch is to fix this issue.
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
2d100d1d73