do not force -L/usr/lib search

The toolchain is perfectly capable of locating system libraries it needs,
so don't hardcode -L/usr/lib as this causes problems when cross-compiling.

BUG=None
TEST=`emerge-x86-alex verity` still works

Change-Id: I49874190585f4cd2e690b32683b1a5ab116a5d73
Reviewed-on: https://gerrit.chromium.org/gerrit/15526
Reviewed-by: Elly Jones <ellyjones@chromium.org>
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/Makefile b/Makefile
index 14cc809..f8f5d5a 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,7 @@
 
 ifneq ($(WITH_CHROME),0)
   CXXFLAGS += -DWITH_CHROME=1
-  LDFLAGS += -lpthread -lrt -L/usr/lib -lbase
+  LDFLAGS += -lpthread -lrt -lbase
   WITH_CHROME = 1
 endif