Werror on plugins, removed unnecessary bits from umbrella. moved out appfw.

SConscript

@@ -49,7 +49,7 @@ libpath='''
 	$SECURITY_TRANSFORMS_HOME/lib
 	'''
 
-myenv.Append(CCFLAGS=" -Wall -std=c++11")
+myenv.Append(CCFLAGS=" -Wall -Werror -std=c++11")
 myenv=myenv.Clone(CPPPATH=Split(cpppath), LIBPATH=Split(libpath), SHLIBSUFFIX=".zpi", SHLIBPREFIX="")
 lib=myenv.SharedLibrary("nonce_relocs", Split(files))