[PATCH V2] BaseTools:GuidedSectionTools.txt is not generated correctly

["Fan, ZhijuX" <zhijux.fan@intel.com>]

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2538

For LzmaCompress or BrotliCompress, the platform may use the different
options and add their batch file, such as LzmaCompressPlatform.
Then, specify it in platform.dsc [BuildOptions] to override the default
one in tools_def.txt.

*_*_*_LZMA_PATH = LzmaCompressPlatform

This override tool will be used. But, its name is not specified in the
generated GuidedSectionTools.txt.

Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Bob Feng <bob.c.feng@intel.com>
---
Changed an issue with an incorrect full path in GuidedSectionTools

 BaseTools/Source/Python/AutoGen/PlatformAutoGen.py | 4 +++-
 BaseTools/Source/Python/build/build.py             | 3 ++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/BaseTools/Source/Python/AutoGen/PlatformAutoGen.py b/BaseTools/Source/Python/AutoGen/PlatformAutoGen.py
index d32178b00c93..478a5116fd7a 100644
--- a/BaseTools/Source/Python/AutoGen/PlatformAutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/PlatformAutoGen.py
@@ -866,7 +866,9 @@ class PlatformAutoGen(AutoGen):
                             Value += " " + self._BuildOptionWithToolDef(RetVal)[Tool][Attr]
                         else:
                             Value = self._BuildOptionWithToolDef(RetVal)[Tool][Attr]
-
+                            Def = '_'.join([self.BuildTarget, self.ToolChain, self.Arch, Tool, Attr])
+                            if self.Workspace.ToolDef.ToolsDefTxtDictionary.get(Def):
+                                self.Workspace.ToolDef.ToolsDefTxtDictionary[Def] = Value
                 if Attr == "PATH":
                     # Don't put MAKE definition in the file
                     if Tool != "MAKE":
diff --git a/BaseTools/Source/Python/build/build.py b/BaseTools/Source/Python/build/build.py
index d841fefdc502..01c4c6fe2b84 100755
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -2367,7 +2367,8 @@ class Build():
             # PATH environment variable.
             for dirInPath in os.environ['PATH'].split(os.pathsep):
                 foundPath = os.path.join(dirInPath, tool)
-                if os.path.exists(foundPath):
+                BaseName, Ext = os.path.splitext(foundPath)
+                if os.path.isdir(foundPath) or Ext:
                     return os.path.realpath(foundPath)
 
         # If the tool was not found in the path then we just return
-- 
2.14.1.windows.1