miscellaneous: clean up trailing whitespace throughout

The entire tree's polluted with inappropriate trailing
whitespace. This commit rids our environment of all of
those useless keystrokes. Unfortunately, it sure ain't
a permanent solution and requires every contributor to
instruct their editor(s) to prevent or eliminate them.

Plus it's strongly recommended we all insert something
like what's shown below to our '.gitconfig' file so as
to provide at least some warnings when we try to apply
any patches (git am) that do contain the #@!%& things!

References(s):
~/.gitconfig excerpt ---------------------------------
[core]
  whitespace = trailing-space, space-before-tab, blank-at-eof
[apply]
  whitespace = warn
--------------------------------- ~/.gitconfig excerpt

Signed-off-by: Jim Warner <james.warner@comcast.net>

Documentation/howto-uClibc-buildroot-compilation.txt

@@ -9,7 +9,7 @@ buildroot git clone.
 
 Once the apply merge is done you need to run 'make menuconfig',
 choose Package Selection for the target --->, [*] Show packages that
-are also provided by busybox && System tools ---> [*] procps-ng. 
+are also provided by busybox && System tools ---> [*] procps-ng.
 If you do not want to configure anything else save, exit and make.
 
 Notice that you almost certainly want to PROCPS_NG_VERSION
@@ -80,6 +80,6 @@ index 0000000..0249b07
 +
 +$(eval $(call AUTOTARGETS))
 +$(eval $(call AUTOTARGETS,host))
--- 
+--
 1.7.10