Added amalgamated build.

src/amalgamated.cpp

@@ -0,0 +1,18 @@
+/*
+ *  Copyright 2011-2017 Branimir Karadzic. All rights reserved.
+ *  License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
+ */
+
+#include "commandline.cpp"
+#include "crt.cpp"
+#include "crtimpl.cpp"
+#include "debug.cpp"
+#include "dtoa.cpp"
+#include "fpumath.cpp"
+#include "mutex.cpp"
+#include "os.cpp"
+#include "sem.cpp"
+#include "sort.cpp"
+#include "string.cpp"
+#include "thread.cpp"
+#include "timer.cpp"