set search order consistently in etc/path.mk

[kphannan]

The search order specified for directories in etc/path.mk is inconsistent. Some searches have $(HOME)..... as a first entry, while others have it last. When used $(HOME) should have the highest precedence which would allow the user to provide a local override for any default system directory.

for example:

################ tivaware ##################
ifndef TIVAWAREPATH
SEARCHPATH := \
  /opt/ti/TivaWare/default \
  /opt/TivaWare/default \
  /opt/TivaWare \
  $(HOME)/TivaWare

should be

################ tivaware ##################
ifndef TIVAWAREPATH
SEARCHPATH := \
  $(HOME)/TivaWare \
  /opt/ti/TivaWare/default \
  /opt/TivaWare/default \
  /opt/TivaWare

[kphannan]

I'm looking at these as I build the VM setup with Packer and SaltStack. I can make the changes as I find them.

[bakerstu]

Kevin, I agree, having better consistency here is a good idea. Feel free to make changes as you see fit.