toolchain/eglibc: add missing ld-search-paths patch to 2.17

this patch is a copy of
trunk/toolchain/eglibc/patches/2.16/200-add-dl-search-paths.patch in
trunk/toolchain/eglibc/patches/2.17/200-add-ld-search-paths.patch
please use svn copy instead of applying it (like in
https://dev.openwrt.org/changeset/34290/)

the patch add /usr/lib in the ld search path (for eglibc 2.17),
thus helping libs like libnl-tiny.so (for iw), libjson.so.0 (for ubus,
jshn) to be found

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@free.fr>
Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 36141

toolchain/eglibc/patches/2.17/200-add-dl-search-paths.patch

@@ -0,0 +1,14 @@
+add /usr/lib to default search path for the dynamic linker
+
+--- a/libc/Makeconfig
++++ b/libc/Makeconfig
+@@ -539,6 +539,9 @@
+ default-rpath = $(libdir)
+ endif
+ 
++# Add /usr/lib to default search path for the dynamic linker
++user-defined-trusted-dirs := /usr/lib
++
+ ifndef link-extra-libs
+ link-extra-libs = $(LDLIBS-$(@F))
+ link-extra-libs-static = $(link-extra-libs)