Number of make jobs for bootcycle-images target

[Alex Kashchenko]

Hi,

Currently in jdk9 bootcycle-images make target is executed with 
unlimited number of make jobs. May I ask whether "JOBS=" bit here [1] is 
intentional or just a typo and should be "JOBS=$(JOBS)" instead?

Current variant works on x86_64 but crashes with native arm32 boot cycle 
builds - compilation tasks are spawned faster than being executed.


[1] 
http://hg.openjdk.java.net/jdk9/jdk9/file/41d9f0545d53/make/Main.gmk#l323

-- 
-Alex