haproxy: use linux2628 target for Linux >= 4 as well.

component/haproxy/buildout.cfg

@@ -19,7 +19,7 @@ configure-command = true
 # otherwise use "generic".
 # For ARCH value, x86_64 and i[3456]86 are supported.
 make-options =
-  TARGET="$(uname -sr 2>/dev/null|grep -Eq '^Linux (2\.6\.2[89]|2\.6\.[3-9]|3)' && echo linux2628 || echo generic)"
+  TARGET="$(uname -sr 2>/dev/null|grep -Eq '^Linux (2\.6\.2[89]|2\.6\.[3-9]|[3-9])' && echo linux2628 || echo generic)"
   ARCH="$(uname -m 2>/dev/null|grep -E '^(x86_64|i[3456]86)$')"
   PREFIX=${buildout:parts-directory}/${:_buildout_section_name_}
   USE_DL=1