Directories where the same source files are used to build different objects...

Directories where the same source files are used to build different objects need to keep those objects in separate directories; LPC17xx updates from Chris Taglia

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5762 42af7a65-404d-4744-a932-0658087f49c3