Corrected the sky130 Makefile so that if the repository is checked out
or built from a zip file or tarball, and is not itself a git repo, then
the revision number will get set from the VERSION file (like it used to
be) instead of relying on "git describe" which won't return anything.

VERSION

diff --git a/VERSION b/VERSION
index 9632c46..4a063f1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.140
+1.0.141

sky130/Makefile.in

diff --git a/sky130/Makefile.in b/sky130/Makefile.in
index 2557f6b..8423fb7 100644
--- a/sky130/Makefile.in
+++ b/sky130/Makefile.in
@@ -128,8 +128,15 @@
 SHELL = bash
 MV = mv
 
-REVISION    = `git describe --long`
-TECH	= sky130
+# Use git revision if this is a cloned repo;  otherwise get the revision
+# from the VERSION file in the directory above.
+GITREV = $(shell git describe --long)
+ifeq (${GITREV},)
+    REVISION = $(shell cat ../VERSION)
+else
+    REVISION = ${GITREV}
+endif
+TECH = sky130
 
 # If EF_STYLE is set to 1, then efabless naming conventions are
 # used, otherwise the generic naming conventions are used.
@@ -143,7 +150,7 @@
 # although /tmp or a dedicated staging area are also fine, as long
 # as the install process can write to the path.
 
-STAGING_PATH = `pwd`
+STAGING_PATH = $(shell pwd)
 
 # If LINK_TARGETS is set to "none", then files are copied
 # from the SkyWater sources to the target.  If set to "source",