[Patch] BaseTools: remove the hardcoded /bin/bash for PreBuild/PostBuild

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

This patch remove the hardcoded /bin/bash for PreBuild/PostBuild
scripts.

Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
---
 BaseTools/Source/Python/build/build.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/BaseTools/Source/Python/build/build.py b/BaseTools/Source/Python/build/build.py
index 45ccac1..bd14e27 100644
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -1037,11 +1037,11 @@ class Build():
             if sys.platform == "win32":
                 args = ' && '.join((self.Prebuild, 'set > ' + PrebuildEnvFile))
                 Process = Popen(args, stdout=PIPE, stderr=PIPE)
             else:
                 args = ' && '.join((self.Prebuild, 'env > ' + PrebuildEnvFile))
-                Process = Popen(args, stdout=PIPE, stderr=PIPE, shell=True, executable="/bin/bash")
+                Process = Popen(args, stdout=PIPE, stderr=PIPE, shell=True)
 
             # launch two threads to read the STDOUT and STDERR
             EndOfProcedure = Event()
             EndOfProcedure.clear()
             if Process.stdout:
@@ -1079,11 +1079,11 @@ class Build():
         if self.Postbuild:
             EdkLogger.info("\n- Postbuild Start -\n")
             if sys.platform == "win32":
                 Process = Popen(self.Postbuild, stdout=PIPE, stderr=PIPE)
             else:
-                Process = Popen(self.Postbuild, stdout=PIPE, stderr=PIPE, shell=True, executable="/bin/bash")
+                Process = Popen(self.Postbuild, stdout=PIPE, stderr=PIPE, shell=True)
             # launch two threads to read the STDOUT and STDERR
             EndOfProcedure = Event()
             EndOfProcedure.clear()
             if Process.stdout:
                 StdOutThread = Thread(target=ReadMessage, args=(Process.stdout, EdkLogger.info, EndOfProcedure))
-- 
2.6.1.windows.1