[COMMITTED PATCH] bfd/doc: Fix racy build failure from missing mkdir

[Roland McGrath]

I'm not sure how new this is, but I've started seeing a build failure
from bfd/doc not existing in the build directory.
Committed as obvious enough.

Thanks,
Roland

bfd/
2022-01-24  Roland McGrath  <mcgrathr@google.com>

        * doc/local.mk (%D%/bfdver.texi): Add mkdir command.

diff --git a/bfd/doc/local.mk b/bfd/doc/local.mk
index 18a2af1b01d..6a9cceb727a 100644
--- a/bfd/doc/local.mk
+++ b/bfd/doc/local.mk
@@ -127,6 +127,7 @@ REGEN_TEXI = \

 %D%/bfdver.texi: $(srcdir)/Makefile.in
        $(AM_V_GEN)\
+       $(MKDIR_P) $(@D); \
        echo "@set VERSION $(VERSION)" > $@; \
        if test -n "$(PKGVERSION)"; then \
          echo "@set VERSION_PACKAGE $(PKGVERSION)" >> $@; \