Bump libdeflate (closes #6)

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "libdeflate-java-core/src/main/c/libdeflate"]
 	path = libdeflate-java-core/src/main/c/libdeflate
-	url = https://github.com/ebiggers/libdeflate.git
+	url = https://github.com/ebiggers/libdeflate.git

libdeflate-java-core/Makefile

@@ -38,7 +38,7 @@ CFLAGS += -std=c99 -fvisibility=hidden \
     $(call cc-option,-Wvla)	\
     $(call cc-option,-Wimplicit-fallthrough)
 
-SRCS = $(wildcard $(SRC_DIR)/*.c) $(wildcard $(SRC_DIR)/libdeflate/lib/*.c) $(wildcard $(SRC_DIR)/libdeflate/lib/arm/*.c) $(wildcard $(SRC_DIR)/libdeflate/lib/x86/*.c)
+SRCS = $(wildcard $(SRC_DIR)/*.c) $(wildcard $(SRC_DIR)/libdeflate/lib/*.c) $(wildcard $(SRC_DIR)/libdeflate/lib/arm/*.c) $(wildcard $(SRC_DIR)/libdeflate/lib/x86/*.c) $(wildcard $(SRC_DIR)/libdeflate/lib/riscv/*.c)
 OBJS = $(SRCS:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o)
 
 .PHONY: directories
@@ -59,6 +59,7 @@ ${OBJ_DIR}:
 	mkdir -p $(OBJ_DIR)/libdeflate/lib
 	mkdir -p $(OBJ_DIR)/libdeflate/lib/x86
 	mkdir -p $(OBJ_DIR)/libdeflate/lib/arm
+	mkdir -p $(OBJ_DIR)/libdeflate/lib/riscv
 
 clean:
 	rm -rf $(LIB_DIR) $(OBJ_DIR)