Merge pull request #2 from bentley/cxxtest

testrunner: respect environment-defined CXX (like other gambatte parts do).

testrunner/SConstruct

@@ -1,11 +1,15 @@
 global_cflags = ARGUMENTS.get('CFLAGS', '-Wall -Wextra -O2 -g')
 global_cxxflags = ARGUMENTS.get('CXXFLAGS', global_cflags + ' -fno-exceptions -fno-rtti')
 global_defines = ' -DHAVE_STDINT_H'
+vars = Variables()
+vars.Add('CC')
+vars.Add('CXX')
 
 env = Environment(CPPPATH = ['.', '../libgambatte/include'],
                   CFLAGS = global_cflags + global_defines,
                   CXXFLAGS = global_cxxflags + global_defines,
-                  LIBS = 'm')
+                  LIBS = 'm',
+                  variables = vars)
 
 sourceFiles = Split('''
 			testrunner.cpp