kbuild: remove redundant 'set -e' from filechk_offsets

Backport changes from the kernel

commit f3fd4a3f3a38 ("kbuild: remove redundant 'set -e' from filechk_offsets")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index c3c6c94..a2b3b2e 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -718,7 +718,7 @@
 # Use filechk to avoid rebuilds when a header changes, but the resulting file
 # does not
 define filechk_offsets
-	(set -e; \
+	( \
 	 echo "#ifndef $2"; \
 	 echo "#define $2"; \
 	 echo "/*"; \