bless tests for changed library path

Author: RalfJung

tests/ui/extern/extern-types-field-offset.run.stderr

@@ -1,4 +1,4 @@
-thread 'main' panicked at core/src/panicking.rs:$LINE:$COL:
+thread 'main' panicked at library/core/src/panicking.rs:$LINE:$COL:
 attempted to compute the size or alignment of extern type `Opaque`
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 thread caused non-unwinding panic. aborting.

tests/ui/extern/extern-types-size_of_val.align.run.stderr

@@ -1,4 +1,4 @@
-thread 'main' panicked at core/src/panicking.rs:$LINE:$COL:
+thread 'main' panicked at library/core/src/panicking.rs:$LINE:$COL:
 attempted to compute the size or alignment of extern type `A`
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 thread caused non-unwinding panic. aborting.

tests/ui/extern/extern-types-size_of_val.size.run.stderr

@@ -1,4 +1,4 @@
-thread 'main' panicked at core/src/panicking.rs:$LINE:$COL:
+thread 'main' panicked at library/core/src/panicking.rs:$LINE:$COL:
 attempted to compute the size or alignment of extern type `A`
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 thread caused non-unwinding panic. aborting.

tests/ui/panics/panic-in-cleanup.run.stderr

@@ -4,6 +4,6 @@ note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 thread 'main' panicked at $DIR/panic-in-cleanup.rs:16:9:
 BOOM
 stack backtrace:
-thread 'main' panicked at core/src/panicking.rs:$LINE:$COL:
+thread 'main' panicked at library/core/src/panicking.rs:$LINE:$COL:
 panic in a destructor during cleanup
 thread caused non-unwinding panic. aborting.

tests/ui/panics/panic-in-ffi.run.stderr

@@ -2,7 +2,7 @@ thread 'main' panicked at $DIR/panic-in-ffi.rs:21:5:
 Test
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 Noisy Drop
-thread 'main' panicked at core/src/panicking.rs:$LINE:$COL:
+thread 'main' panicked at library/core/src/panicking.rs:$LINE:$COL:
 panic in a function that cannot unwind
 stack backtrace:
 thread caused non-unwinding panic. aborting.

tests/ui/process/println-with-broken-pipe.run.stderr

@@ -1,3 +1,3 @@
-thread 'main' panicked at std/src/io/stdio.rs:LL:CC:
+thread 'main' panicked at library/std/src/io/stdio.rs:LL:CC:
 failed printing to stdout: Broken pipe (os error 32)
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace