Initial testing support

Added the ability to compile a subset of functions in to a test
executable for Linux. To be used in the future for testing.

Removed unnecessary includes.

Tested working by compiling test executable for GNU/Linux and for the
3DS. The 3dsx was tested in citra.

Signed-off-by: Mahyar Koshkouei <mk@deltabeard.com>

Makefile.linux

@@ -0,0 +1,63 @@
+# Makefile to produce test build of ctrmus for Linux
+#
+# make -f Makefile.linux
+
+ifeq ($(OS),Windows_NT)
+    HOST_OS := windows
+    ifeq ($(PROCESSOR_ARCHITECTURE),AMD64)
+        HOST_ARCH := x86_64
+    else
+        HOST_ARCH := i686
+    endif
+else
+    UNAME_M := $(shell uname -m)
+    ifeq ($(UNAME_M),$(filter $(UNAME_M),x86_64 amd64))
+        HOST_ARCH := x86_64
+    else ifeq ($(UNAME_M),$(filter $(UNAME_M),i386 i686))
+        HOST_ARCH := i686
+    else
+        $(error "Unsupported host architecture.")
+    endif
+endif
+
+IDIR =./source
+CC=gcc
+CFLAGS=-I./include/
+LIBS=-lmpg123 -lvorbisidec -lopusfile -lopus -logg -lm
+
+ODIR=./build/$(HOST_ARCH)
+SDIR=./source
+
+_DEPS = all.h		\
+		flac.h		\
+		mp3.h		\
+		opus.h		\
+		vorbis.h	\
+		wav.h
+
+DEPS = $(patsubst %,$(IDIR)/%,$(_DEPS))
+
+_OBJ = flac.o		\
+		mp3.o		\
+		opus.o		\
+		test.o		\
+		vorbis.o	\
+		wav.o
+
+OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))
+
+all: directory test
+
+directory:
+	mkdir -p $(ODIR)
+
+$(ODIR)/%.o: $(SDIR)/%.c $(DEPS)
+	$(CC) -c -o $@ $< $(CFLAGS)
+
+test: $(OBJ)
+	gcc -o $@ $^ $(CFLAGS) $(LIBS)
+
+.PHONY: clean directory
+
+clean:
+	rm -f $(ODIR)/*.o *~ core $(INCDIR)/*~