MDEV-11164 - hardening-wrapper has been removed from Debian Sid

The hardening-wrapper package has been removed from Debian Sid. Remove
dependency and relevant settings.

debian/control

@@ -9,7 +9,6 @@ Build-Depends: bison,
                debhelper,
                dpatch,
                gawk,
-               hardening-wrapper,
                libjemalloc-dev (>= 3.0.0),
                libncurses5-dev (>= 5.0-6),
                libpam0g-dev,

debian/dist/Debian/rules

 #!/usr/bin/make -f
 
 export DH_VERBOSE=1
-export DEB_BUILD_HARDENING=1
 
 PACKAGE=mariadb-10.0
 

debian/dist/Ubuntu/rules

 #!/usr/bin/make -f
 
 export DH_VERBOSE=1
-export DEB_BUILD_HARDENING=1
 
 PACKAGE=mariadb-10.0