Add libalm to the regular system libs.

libalm.so is used by Stack & Tile as well as for the constraint-based
layout BALMLayout. This also adds libalm.so to the development package;
links it to /boot/system/development/lib.

build/jam/images/definitions/regular

@@ -64,6 +64,7 @@ rule HaikuImageGetSystemLibs
 		$(HAIKU_SHARED_LIBSUPC++_$(TARGET_PACKAGING_ARCH))
 		# libs with standard grist
 		[ MultiArchDefaultGristFiles [ FFilterByBuildFeatures
+			libalm.so
 			libbe.so libbsd.so libbnetapi.so
 			libdebug.so libdevice.so
 			libgame.so libglut.so@mesa libgnu.so