manifest: modifty the path of some projects.

N/A

projects:
1. devtools/gcc/linux-x86/arm/arm-none-eabi-4.7.3
2. devtools/gcc/linux-x86/arm/arm-none-linux-gnueabi-4.7.3

Change-Id: I76332e876728434927dbf6c17776996047cfc192
Signed-off-by: liminghao <liminghao@xiaomi.com>