Higher degree of parallel compilation on the LLVM side.

Change-Id: If69deaa7c787021a7b136719ce316fff803aa3b0
diff --git a/build/Android.common.mk b/build/Android.common.mk
index e62602c..5e93af5 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -89,6 +89,10 @@
 
 ART_TARGET_DEBUG_CFLAGS := $(art_debug_cflags)
 
+ifeq ($(ART_USE_LLVM_COMPILER),true)
+PARALLEL_ART_COMPILE_JOBS := -j8
+endif
+
 DEX2OAT_SRC_FILES := \
 	src/dex2oat.cc