make sure there is always a build directory to put doxgen stuff html in

currently if you do a make clean-all or have never done a code build, there will be no build directory and doxygen is going to want to create and put files into build/docs/html

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1567313002 .

Patch from Reed Kotler <rkotlerimgtec@gmail.com>.

diff --git a/docs/Makefile.standalone b/docs/Makefile.standalone
index a0e3748..b1094aa 100644 (file)
--- a/docs/Makefile.standalone
+++ b/docs/Makefile.standalone
@@ -1,5 +1,6 @@
 .PHONY: all
 
 all:
+       mkdir -p ../build
        doxygen Doxyfile
        @echo See file://`pwd`/../build/docs/html/index.html