Use custom GCC toolchain

Makefile

@@ -17,6 +17,18 @@ prepare:
 		cd limine; \
 		make; \
 	fi
+	if [ ! -d toolchain/binutils-gdb ]; then \
+		cd toolchain; \
+		git clone git://sourceware.org/git/binutils-gdb.git --depth=1; \
+		$(PWD)/scripts/build-binutils-gdb.sh; \
+		cd ..; \
+	fi
+	if [ ! -d toolchain/gcc ]; then \
+		cd toolchain; \
+		git clone https://gcc.gnu.org/git/gcc.git --depth=1; \
+		$(PWD)/scripts/build-gcc.sh; \
+		cd ..; \
+	fi
 
 cleanall:
 	make clean