Fix `CLASS` for fill_diode LEF files.

Replace `CLASS SPACER` with `CLASS CORE SPACER`.

Fixes https://github.com/google/skywater-pdk/issues/141.

Updating submodules on 2020-11-17 16:43:23 UTC

 - Updating [`sky130_fd_sc_hs` latest](https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_fd_sc_hs/+/v0.0.2-48-g98372f07..v0.0.2-50-g1d051f49) to v0.0.2-50-g1d051f49
 - Updating [`sky130_fd_sc_hs` v0.0.1](https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_fd_sc_hs/+/v0.0.1-24-g7ad9f328..v0.0.1-25-g81f50340) to v0.0.1-25-g81f50340
 - Updating [`sky130_fd_sc_hs` v0.0.2](https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_fd_sc_hs/+/v0.0.2-48-g98372f07..v0.0.2-50-g1d051f49) to v0.0.2-50-g1d051f49
 - Updating [`sky130_fd_sc_ms` latest](https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_fd_sc_ms/+/v0.0.2-52-g390bbc90..v0.0.2-54-gae1b7f68) to v0.0.2-54-gae1b7f68
 - Updating [`sky130_fd_sc_ms` v0.0.1](https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_fd_sc_ms/+/v0.0.1-26-ge1bcbf8e..v0.0.1-27-g14d70b1f) to v0.0.1-27-g14d70b1f
 - Updating [`sky130_fd_sc_ms` v0.0.2](https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_fd_sc_ms/+/v0.0.2-52-g390bbc90..v0.0.2-54-gae1b7f68) to v0.0.2-54-gae1b7f68

 * libraries/sky130_fd_sc_hs/latest 98372f0...1d051f4 (1):
   > Fix `CLASS` for fill_diode LEF files.

 * libraries/sky130_fd_sc_hs/v0.0.1 7ad9f32...81f5034 (1):
   > Fix `CLASS` for fill_diode LEF files.

 * libraries/sky130_fd_sc_hs/v0.0.2 98372f0...1d051f4 (1):
   > Fix `CLASS` for fill_diode LEF files.

 * libraries/sky130_fd_sc_ms/latest 390bbc9...ae1b7f6 (1):
   > Fix `CLASS` for fill_diode LEF files.

 * libraries/sky130_fd_sc_ms/v0.0.1 e1bcbf8...14d70b1 (1):
   > Fix `CLASS` for fill_diode LEF files.

 * libraries/sky130_fd_sc_ms/v0.0.2 390bbc9...ae1b7f6 (1):
   > Fix `CLASS` for fill_diode LEF files.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
diff --git a/libraries/sky130_fd_sc_hs/latest b/libraries/sky130_fd_sc_hs/latest
index 98372f0..1d051f4 160000
--- a/libraries/sky130_fd_sc_hs/latest
+++ b/libraries/sky130_fd_sc_hs/latest
@@ -1 +1 @@
-Subproject commit 98372f07325278030d44abc451f2cd919ba2429e
+Subproject commit 1d051f49bfe4e2fe9108d702a8bc2e9c081005a4
diff --git a/libraries/sky130_fd_sc_hs/v0.0.1 b/libraries/sky130_fd_sc_hs/v0.0.1
index 7ad9f32..81f5034 160000
--- a/libraries/sky130_fd_sc_hs/v0.0.1
+++ b/libraries/sky130_fd_sc_hs/v0.0.1
@@ -1 +1 @@
-Subproject commit 7ad9f328a4af07c8fd5f7d848d74709450168fb3
+Subproject commit 81f50340c068801dd2fd07d4343be6b28e241a9d
diff --git a/libraries/sky130_fd_sc_hs/v0.0.2 b/libraries/sky130_fd_sc_hs/v0.0.2
index 98372f0..1d051f4 160000
--- a/libraries/sky130_fd_sc_hs/v0.0.2
+++ b/libraries/sky130_fd_sc_hs/v0.0.2
@@ -1 +1 @@
-Subproject commit 98372f07325278030d44abc451f2cd919ba2429e
+Subproject commit 1d051f49bfe4e2fe9108d702a8bc2e9c081005a4
diff --git a/libraries/sky130_fd_sc_ms/latest b/libraries/sky130_fd_sc_ms/latest
index 390bbc9..ae1b7f6 160000
--- a/libraries/sky130_fd_sc_ms/latest
+++ b/libraries/sky130_fd_sc_ms/latest
@@ -1 +1 @@
-Subproject commit 390bbc90badd0f63195b968a7a77bb45f9797fe7
+Subproject commit ae1b7f68821505cf2d93d9d44cce5ece22710fad
diff --git a/libraries/sky130_fd_sc_ms/v0.0.1 b/libraries/sky130_fd_sc_ms/v0.0.1
index e1bcbf8..14d70b1 160000
--- a/libraries/sky130_fd_sc_ms/v0.0.1
+++ b/libraries/sky130_fd_sc_ms/v0.0.1
@@ -1 +1 @@
-Subproject commit e1bcbf8eed456f6fa061581fec050f10da19ba3a
+Subproject commit 14d70b1f15931f2eeb093a2ea10e350c19dd88f9
diff --git a/libraries/sky130_fd_sc_ms/v0.0.2 b/libraries/sky130_fd_sc_ms/v0.0.2
index 390bbc9..ae1b7f6 160000
--- a/libraries/sky130_fd_sc_ms/v0.0.2
+++ b/libraries/sky130_fd_sc_ms/v0.0.2
@@ -1 +1 @@
-Subproject commit 390bbc90badd0f63195b968a7a77bb45f9797fe7
+Subproject commit ae1b7f68821505cf2d93d9d44cce5ece22710fad