Replaced the GDS of the efabless-generated "fill 12" cell for the HD library
with a version that is flattened, rather than a cell composed of three other
library cells.  This should prevent issues with the component cells not being
read in at the time that the fill 12 cell is processed.  Also:  Added sky130B
to the .gitignore file in the sky130 directory, so that built PDKs do not try
to get themselves into the repository.

VERSION

diff --git a/VERSION b/VERSION
index e9034ea..cff7ecc 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.284
+1.0.285

sky130/.gitignore

diff --git a/sky130/.gitignore b/sky130/.gitignore
index 8ea53d5..c0330e2 100644
--- a/sky130/.gitignore
+++ b/sky130/.gitignore
@@ -1,4 +1,5 @@
 # staged PDKs
 sky130A/
+sky130B/
 
-*.log
\ No newline at end of file
+*.log

sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fill_12.gds

diff --git a/sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fill_12.gds b/sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fill_12.gds
index bfbdb7c..cba0fa2 100644
--- a/sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fill_12.gds
+++ b/sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fill_12.gds
Binary files differ