[PR/87936] --disable-checking bootstrap break

https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00502.html
	PR 87926
	* Makefile.in (bitmap.o-warn): Add -Wno-error to unbreak
	--disable-checking bootstrap.

From-SVN: r265899

gcc/ChangeLog

+2018-11-07  Nathan Sidwell  <nathan@acm.org>
+
+	PR 87926
+	* Makefile.in (bitmap.o-warn): Add -Wno-error to unbreak
+	--disable-checking bootstrap.
+
 2018-11-07  Hafiz Abid Qadeer  <abidh@codesourcery.com>
 
 	* configure: Regenerated.

gcc/Makefile.in

@@ -221,6 +221,7 @@ libgcov-merge-tool.o-warn = -Wno-error
 gimple-match.o-warn = -Wno-unused
 generic-match.o-warn = -Wno-unused
 dfp.o-warn = -Wno-strict-aliasing
+bitmap.o-warn = -Wno-error # PR 87926
 
 # All warnings have to be shut off in stage1 if the compiler used then
 # isn't gcc; configure determines that.  WARN_CFLAGS will be either