Add tasks - close #139

build_tests/simple_cc/Rsconscript

@@ -1,4 +1,4 @@
-build do
+default do
   Environment.new do |env|
     env.Program('simple.exe', Dir['*.cc'])
   end

build_tests/simple_cc/cxxsuffix.rb

@@ -1,4 +1,4 @@
-build do
+default do
   Environment.new do |env|
     env["CXXSUFFIX"] = %w[.cccc .cc]
     env["CXXFLAGS"] += %w[-x c++]

build_tests/simple_cc/link_objects.rb

@@ -1,4 +1,4 @@
-build do
+default do
   Environment.new do |env|
     env.Object("simple.o", "simple.cc")
     env.Program("simple.exe", "simple.o")

build_tests/simple_cc/preprocess.rb

@@ -1,4 +1,4 @@
-build do
+default do
   Environment.new do |env|
     env.Preprocess("simplepp.cc", "simple.cc")
     env.Program("simple.exe", "simplepp.cc")