use Rsconscript instead of Rsconsfile - close #62

build_tests/shared_library/Rsconscript

@@ -0,0 +1,11 @@
+Rscons::Environment.new do |env|
+  env["CPPPATH"] << "src/lib"
+  libmine = env.SharedLibrary("mine", Rscons.glob("src/lib/*.c"))
+  env.Program("test-shared.exe",
+              Rscons.glob("src/*.c"),
+              "LIBPATH" => %w[.],
+              "LIBS" => %w[mine])
+  env.build_after("test-shared.exe", libmine.to_s)
+  env.Program("test-static.exe",
+              Rscons.glob("src/**/*.c"))
+end