Minor Makefile fixes

[Adam Jackson]

Attached patch from Fedora CVS does two things:

- 'mkdir -p' on the install directory, for the case where $DESTDIR is an
empty install root.
- Set CFLAGS with ?=, not =, so the environment can override it.

Please apply.

- ajax
-------------- next part --------------
A non-text attachment was scrubbed...
Name: powertop-1.1-build-fixes.patch
Type: text/x-patch
Size: 533 bytes
Desc: not available
Url : http://www.bughost.org/pipermail/power/attachments/20070514/6b66686f/powertop-1.1-build-fixes.bin