uboot-tools: bump to version 2014.04

uboot-tools: bump to version 2014.04

U-Boot v2014.04 introduced significant changes in its build infrastrcture.

Among things related to buildroot are:
1. Special new target ("tools-only") was added for building host tools alone

2. Tools cross-building for target is no longer possible with substitution of
HOSTxx with TARGETxx because host binaries won't be built. Instead we just set
CROSS_COMPILE and CROSS_BUILD_TOOLS variables.

3. Most of make targets now require U-Boot to be configured before building.
So for building generic "fw_printenv" we now need to make "env" target config-
independent.

4. HOSTCPPFLAGS are not used anywhere, so dropping
"uboot-tools-02-hostcflags-override-fix.patch"

Also due to lincese boilerplate change in sources
"uboot-tools-01-drop-configh-from-tools.patch" required subtle changes.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Cc: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>