Remove duplicate line in linker/Android.mk.

Change-Id: I7b4d5fcdfacc840bbda4ffd965e5315c4651cfe5
Merge "Remove duplicate line in linker/Android.mk."
Add lsearch(3) for ltrace.

Bug: 13746936
Change-Id: I833c6ba70a1752c04dab7de389f5bebb741662b3
Merge "Add lsearch(3) for ltrace."
auto-merger: merge in from aosp/master