[Patch] BaseTools:Override the MAKE_FLAGS by BuildOptions in DSC

[Yonghong Zhu <yonghong.zhu@intel.com>]

The issue that *_*_*_MAKE_FLAGS doesn't work in DSC [BuildOptions]
section. It means MAKE flags can't be set in platform DSC file.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
---
 BaseTools/Source/Python/AutoGen/AutoGen.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/BaseTools/Source/Python/AutoGen/AutoGen.py b/BaseTools/Source/Python/AutoGen/AutoGen.py
index 405bfa1..1787dec 100644
--- a/BaseTools/Source/Python/AutoGen/AutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/AutoGen.py
@@ -1905,10 +1905,17 @@ class PlatformAutoGen(AutoGen):
                 self._BuildCommand += SplitOption(self.ToolDefinition["MAKE"]["PATH"])
                 if "FLAGS" in self.ToolDefinition["MAKE"]:
                     NewOption = self.ToolDefinition["MAKE"]["FLAGS"].strip()
                     if NewOption != '':
                         self._BuildCommand += SplitOption(NewOption)
+                if "MAKE" in self.EdkIIBuildOption:
+                    if "FLAGS" in self.EdkIIBuildOption["MAKE"]:
+                        Flags = self.EdkIIBuildOption["MAKE"]["FLAGS"]
+                        if Flags.startswith('='):
+                            self._BuildCommand = [self._BuildCommand[0]] + [Flags[1:]]
+                        else:
+                            self._BuildCommand += [Flags]
         return self._BuildCommand
 
     ## Get tool chain definition
     #
     #  Get each tool defition for given tool chain from tools_def.txt and platform
-- 
2.6.1.windows.1