dropbear: don't override DISTRO_TYPE if it is already set

The long term solution is to remove the IMAGE_FEATURE check since images are not allowed to influence recipe compile options.

(From OE-Core rev: 1c24f36e982e680871bf7a05ac6e820314e19c7c)

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/dropbear/dropbear.inc

@@ -29,7 +29,7 @@ SBINCOMMANDS = "dropbear dropbearkey dropbearconvert"
 BINCOMMANDS = "dbclient ssh scp"
 EXTRA_OEMAKE = 'MULTI=1 SCPPROGRESS=1 PROGRAMS="${SBINCOMMANDS} ${BINCOMMANDS}"'
 
-DISTRO_TYPE = "${@base_contains("IMAGE_FEATURES", "debug-tweaks", "debug", "",d)}"
+DISTRO_TYPE ?= "${@base_contains("IMAGE_FEATURES", "debug-tweaks", "debug", "",d)}"
 
 do_debug_patch() {
 	if [ "${DISTRO_TYPE}" = "debug" ]; then

meta/recipes-core/dropbear/dropbear_0.52.bb

@@ -3,4 +3,4 @@ require dropbear.inc
 SRC_URI[md5sum] = "1c69ec674481d7745452f68f2ea5597e"
 SRC_URI[sha256sum] = "e3a2ca49ed85ce562240c0ac06e2f72826d7e52a83e80d91c067c8b97bf5c108"
 
-PR = "r2"
+PR = "r3"