Drop unnecessary include path to workaround possible ldd bug
https://bugs.gentoo.org/731168
----
diff --git a/config.mk b/config.mk
index 5d42b38..61d085a 100644
--- a/config.mk
+++ b/config.mk
@@ -9,7 +9,7 @@ MANPREFIX = ${PREFIX}/share/man
 
 # includes and libs
 INCS = -I. -I/usr/include
-LIBS = -L/usr/lib -lc
+LIBS = -lc
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\" -D_GNU_SOURCE