Fix build when WITH_CCACHE_BUILD is set.

The problem is that WITH_CCACHE_BUILD adds PATH to the MAKE_ENV, but
the gnustep support sources a GNUStep.sh file that already sets the
PATH. Next when env PATH=... is called, it overwrites and losers the
gnustep PATH additions. This is a temporary fix until a better
solution is found.
Fix build with WITH_CCACHE_BUILD with ports that override PATH via
MAKE_ENV or CONFIGURE_ENV. I.e., don't set PATH in MAKE_ENV twice as
env(1) only takes one, in which case some ports fail to build. One
example is any USES=ada port (such as textproc/xmlada). Instead,
add the ccache path into PATH via := and let it fall into there
via the sourcing port's MAKE_ENV=PATH=...:${PATH} line.

A more comprehensive solution to this could be to add a MACRO/feature
to modify the PATH for all ports without using MAKE_ENV via
something like ADDPATH=...

With hat:	portmgr
Tested by:	several exp-runs
Update to 1.4.0.
Update to 4.4.0
Litecoin is a peer-to-peer Internet currency that enables instant payments to
anyone in the world. It is based on the Bitcoin protocol but differs from
Bitcoin in that it can be efficiently mined with consumer-grade hardware.
Litecoin provides faster transaction confirmations (2.5 minutes on average) and
uses memory-hard, scrypt-based mining proof-of-work algorithm to target the
regular computers and GPUs most people already have. The Litecoin network is
scheduled to produce 84 million currency units.

One of the aims of Litecoin was to provide a mining algorithm that could run at
the same time, on the same hardware used to mine bitcoins. With the rise of
specialized ASICs for Bitcoin, Litecoin continues to satisfy these goals. It is
unlikely for ASIC mining to be developed for Litecoin until the currency is
widely used.

WWW: http://www.litecoin.org/
Update to 1.7.4.
 - Add missing type for py-txamqp codec
 - Pass maintainership to submitter.

PR:		ports/179100
Submitted by:	Chenguang Li <horus.li gmail.com>
- Mark BROKEN fails to build
- Unbreak build
. update to 1.33.0;
. check for "${PORT_OPTIONS:MDOCS}" rather then "! ${PORT_OPTIONS:MDOCS}"
  since both conditions are used.
- Remove support for Linux 2.4

Submitted by:	rene@
- Finish removal of support for Linux 2.4 in bsd.linux-apps.mk and
  bsd.linux-rpm.mk.  The default linux version is now Fedora 10.
- Remove now obsolete checks for Linux 2.4 in emulators/linux_base-c6,
  emulators/linux_base-f10, and emulators/linux_dist-gentoo-stage3.
  While there, remove superfluous -p argument from ${MKDIR}.
- Remove now obsolete check for Linux 2.4 or FreeBSD 6 and lower from
  astro/google-earth.
- Remove expired Fedora Core 4 ports which were only used on FreeBSD 7
  and below.
- Update LEGAL and MOVED

PR:		ports/176877
Submitted by:	myself
Approved by:	portmgr (bapt)
Exp-run by:	bapt
Update to 1.4:

- Actually checkout the older version when recursing

Reported by:	jrm: IRC

- Behave properly when the path to the temp ports directory contains a symlink
Update deskutils/horde-groupware and mail/horde-webmail to 5.0.5
- Update to 0.8.2

PR:		ports/179091
Submitted by:	Robert Backahus <robbak@robbak.com>
- Unbreak with clang
- Use PORTDOCS, PORT_OPTIONS, DATADIR
- Trim Makefile header

Approved by:	miwi (mentor)
- Update distinfo due to github, if it happens again, I'll make a local dist file
- Update to version 0.8.4 [1]
- Remove Author tag, fix WWW line in pkg-descr

PR:		ports/179069 [1]
Submitted by:	Phil Oleson <oz@nixil.net> (maintainer)
- Fix kvm_read() issue
- Bump PORTREVISION

PR:		ports/177761
Submitted by:	sbruno@
- Unbreak build on HEAD