Fix the build: properly detect the BUILD OS version of Java, not the host one.
This matters when building Windows under Linux.
Change-Id: I1eaa4eeda4df359313f16d52605a1b8298765269
diff --git a/core/combo/javac.mk b/core/combo/javac.mk
index d4c04e7..f8c99fb 100644
--- a/core/combo/javac.mk
+++ b/core/combo/javac.mk
@@ -8,7 +8,7 @@
# COMMON_JAVAC -- Java compiler command with common arguments
# Whatever compiler is on this system.
-ifeq ($(HOST_OS), windows)
+ifeq ($(BUILD_OS), windows)
COMMON_JAVAC := development/host/windows/prebuilt/javawrap.exe -J-Xmx256m \
-target 1.5 -Xmaxerrs 9999999
else