md5sum/sha1sum/unzip: split out of mondo mem file

There's no real need to keep these functions in the cmd_mem file since
they do not use any of the common global mem variables.  So split them
out into their own dedicated cmd files.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/common/Makefile b/common/Makefile
index 4555716..26380c6 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -110,6 +110,7 @@
 COBJS-y += cmd_load.o
 COBJS-$(CONFIG_LOGBUFFER) += cmd_log.o
 COBJS-$(CONFIG_ID_EEPROM) += cmd_mac.o
+COBJS-$(CONFIG_CMD_MD5SUM) += cmd_md5sum.o
 COBJS-$(CONFIG_CMD_MEMORY) += cmd_mem.o
 COBJS-$(CONFIG_CMD_MFSL) += cmd_mfsl.o
 COBJS-$(CONFIG_CMD_MG_DISK) += cmd_mgdisk.o
@@ -134,6 +135,7 @@
 COBJS-$(CONFIG_CMD_SATA) += cmd_sata.o
 COBJS-$(CONFIG_CMD_SF) += cmd_sf.o
 COBJS-$(CONFIG_CMD_SCSI) += cmd_scsi.o
+COBJS-$(CONFIG_CMD_SHA1SUM) += cmd_sha1sum.o
 COBJS-$(CONFIG_CMD_SETEXPR) += cmd_setexpr.o
 COBJS-$(CONFIG_CMD_SPI) += cmd_spi.o
 COBJS-$(CONFIG_CMD_SPIBOOTLDR) += cmd_spibootldr.o
@@ -144,6 +146,7 @@
 COBJS-$(CONFIG_CMD_UBI) += cmd_ubi.o
 COBJS-$(CONFIG_CMD_UBIFS) += cmd_ubifs.o
 COBJS-$(CONFIG_CMD_UNIVERSE) += cmd_universe.o
+COBJS-$(CONFIG_CMD_UNZIP) += cmd_unzip.o
 ifdef CONFIG_CMD_USB
 COBJS-y += cmd_usb.o
 COBJS-y += usb.o