CI: scripts: fix build of vtest regarding option -C

On Linux, GNU make emits "w" at the beginning of the MAKEFLAGS
variable if -C is passed, which happens since vtest d6d228bcb3.
In fact it emits any of the command line flags without the leading
'-' in this case. gmake doesn't do that on BSD apparently. It's
documented under Options/Recursion in the GNU make doc. There's
also MFLAGS that could work but it does not contain the variables
definitions. So let's just avoid the -C that we don't really need.

This needs to be backported to stable versions.

(cherry picked from commit 01843c47a13f01ba899d06ac968ca8a9bf7ff974)
Signed-off-by: Amaury Denoyelle <adenoyelle@haproxy.com>
(cherry picked from commit c42accdb438b63b9ce75306830e418d2cacb254c)
 [ad: context adjustment]
Signed-off-by: Amaury Denoyelle <adenoyelle@haproxy.com>
(cherry picked from commit 678043013d1014d060d4315b0fb95b6286fac05e)
Signed-off-by: Amaury Denoyelle <adenoyelle@haproxy.com>
(cherry picked from commit d1d965ae2993964eddf6a4992fc6c6c570bce8a4)
Signed-off-by: Amaury Denoyelle <adenoyelle@haproxy.com>
1 file changed