move target/linux/image to target/image

openwrt/include/target.mk

openwrt/target/Makefile

openwrt/target/image/ar7/Makefile

openwrt/target/image/ar7/sercomm/adam2.bin

openwrt/target/image/ar7/sercomm/dg834

openwrt/target/image/ar7/sercomm/jdr454wb

openwrt/target/image/ar7/src/LzmaDecode.c

openwrt/target/image/ar7/src/LzmaDecode.h

openwrt/target/image/ar7/src/gzip.h

openwrt/target/image/ar7/src/ld.script.in

openwrt/target/image/ar7/src/loader.c

openwrt/target/image/ar7/src/srec2bin.c

openwrt/target/image/ar7/src/zimage.script.in

openwrt/target/image/aruba/Makefile

openwrt/target/image/aruba/addVersion

openwrt/target/image/aruba/version

openwrt/target/image/au1000/Makefile

openwrt/target/image/brcm/Makefile

openwrt/target/image/brcm/lzma-loader/Makefile

openwrt/target/image/brcm/lzma-loader/src/LzmaDecode.c