Removed hard coded values of toolchain and gcc cpu flags

loader/libs/elf/SConstruct

@@ -6,9 +6,11 @@
 
 import os, sys, shelve
 from os.path import join
+from configure import *
 
-arch = 'arm'
-platform = 'pb926'
+config = configuration_retrieve()
+arch = config.arch
+platform = config.platform
 
 # Get global paths
 PROJRELROOT="../../../"
@@ -19,7 +21,7 @@ LIBC_LIBPATH = LIBC_PATH
 LIBC_INCPATH = [join(LIBC_PATH, 'include'), \
                 join(LIBC_PATH, 'include/arch/' + arch)]
 
-env = Environment(CC = 'arm-none-linux-gnueabi-gcc',
+env = Environment(CC = config.user_toolchain + 'gcc',
 		  CCFLAGS = ['-g', '-nostdinc', '-nostdlib', '-ffreestanding'],
 		  LINKFLAGS = ['-nostdlib'],
 		  ENV = {'PATH' : os.environ['PATH']},