Move comment describing test case

src/test/run-make-fulldeps/redundant-libs/Makefile

@@ -1,4 +1,14 @@
 -include ../tools.mk
+
+# rustc will remove one of the two redundant references to foo below.  Depending
+# on which one gets removed, we'll get a linker error on SOME platforms (like
+# Linux).  On these platforms, when a library is referenced, the linker will
+# only pull in the symbols needed _at that point in time_.  If a later library
+# depends on additional symbols from the library, they will not have been pulled
+# in, and you'll get undefined symbols errors.
+#
+# So in this example, we need to ensure that rustc keeps the _later_ reference
+# to foo, and not the former one.
 RUSTC_FLAGS = \
     -l static=bar \
     -l foo \

src/test/run-make-fulldeps/redundant-libs/main.rs

@@ -8,15 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// rustc will remove one of the two redundant references to foo below.  Depending on which one gets
-// removed, we'll get a linker error on SOME platforms (like Linux).  On these platforms, when a
-// library is referenced, the linker will only pull in the symbols needed _at that point in time_.
-// If a later library depends on additional symbols from the library, they will not have been
-// pulled in, and you'll get undefined symbols errors.
-//
-// So in this example, we need to ensure that rustc keeps the _later_ reference to foo, and not the
-// former one.
-
 extern "C" {
     fn bar();
     fn baz();