Disable wget server side cache

We found some proxy server has wrong cache for long http file name.
It will cause fetching wrong ipk files from adt repo. To avoid this,
we use wget options --no-cache to disable all server side cache.
It will make the fetch speed slower, yet correct always.

(From OE-Core rev: 2e9e8af197671ae06de1bdc9201765b160869d60)

Signed-off-by: Liping Ke <liping.ke@intel.com>
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/installer/adt-installer_1.0.bb

@@ -36,11 +36,13 @@ PR = "r0"
 ADT_DEPLOY = "${TMPDIR}/deploy/sdk/"
 ADT_DIR = "${WORKDIR}/adt-installer/"
 YOCTOADT_VERSION = "${SDK_VERSION}"
+S = "${WORKDIR}/trunk"
 
 inherit deploy
 
 PV = "0.1.8+svnr${SRCPV}"
 SRC_URI = "svn://opkg.googlecode.com/svn;module=trunk;proto=http \
+           file://wget_cache.patch \
            file://adt_installer \
            file://scripts/adt_installer_internal \
            file://scripts/util \
@@ -70,7 +72,6 @@ fakeroot do_deploy () {
 	cp ${WORKDIR}/adt_installer.tar.bz2 ${ADT_DEPLOY}
 }
 
-do_patch[noexec] = "1"
 do_install[noexec] = "1"
 do_configure[noexec] = "1"
 do_compile[noexec] = "1"

meta/recipes-devtools/installer/files/wget_cache.patch

@@ -0,0 +1,10 @@
+--- trunk/libopkg/opkg_download.c	2011-03-10 16:41:29.000000000 +0800
++++ trunk/libopkg/opkg_download.c	2011-03-10 16:42:33.000000000 +0800
+@@ -162,6 +162,7 @@
+ 
+       argv[i++] = "wget";
+       argv[i++] = "-q";
++      argv[i++] = "--no-cache";
+       if (conf->http_proxy || conf->ftp_proxy) {
+ 	argv[i++] = "-Y";
+ 	argv[i++] = "on";