[Buildroot] [git commit branch/2022.02.x] docs/manual: add 'menuconfig' to out-of-tree examples

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=58d46a4373806d6193f256b589d22f85dd45c18a
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2022.02.x

If the examples given for launching an out-of-tree build are executed
as-is, this will result in the error message

    Please configure Buildroot first (e.g. "make menuconfig")

Even if "make menuconfig" was run before, it's still not going to work
because the out-of-tree build doesn't use the in-tree .config.

Therefore, the example really should start with some config option.
Since "make menuconfig" is used in most other examples of creating a
config, use that here as well. Extend both examples with "menuconfig".

Reported-by: AndreiCherniaev <dungeonlords789 at yandex.ru>
Signed-off-by: Arnout Vandecappelle <arnout at mind.be>
(cherry picked from commit c77e31e0b360fffbd893807ccfbc4f35bf2558d1)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 docs/manual/common-usage.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/manual/common-usage.txt b/docs/manual/common-usage.txt
index 9ba87a8339..b60b6d7f53 100644
--- a/docs/manual/common-usage.txt
+++ b/docs/manual/common-usage.txt
@@ -30,13 +30,13 @@ the Linux kernel. To use it, add +O=<directory>+ to the make command
 line:
 
 --------------------
- $ make O=/tmp/build
+ $ make O=/tmp/build menuconfig
 --------------------
 
 Or:
 
 --------------------
- $ cd /tmp/build; make O=$PWD -C path/to/buildroot
+ $ cd /tmp/build; make O=$PWD -C path/to/buildroot menuconfig
 --------------------
 
 All the output files will be located under +/tmp/build+. If the +O+