Don't treat warnings as error when building rocksdbjavastatic

Summary: Don't treat warnings as error when building rocksdbjavastatic

Test Plan: make rocksdbjavastatic -j32

Reviewers: rven, fyrz, adamretter, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D38187

Makefile

@@ -59,6 +59,10 @@ ifeq ($(MAKECMDGOALS),install)
 	DEBUG_LEVEL=0
 endif
 
+ifeq ($(MAKECMDGOALS),rocksdbjavastatic)
+	DEBUG_LEVEL=0
+endif
+
 # compile with -O2 if debug level is not 2
 ifneq ($(DEBUG_LEVEL), 2)
 OPT += -O2 -fno-omit-frame-pointer