Remove libLLVM* from art

The functionality in libbacktrace that depended on libLLVM* has been
split out into libbacktrace_offline.  Remove the unnecessary
dependencies from dex2oats.

Test: m -j dex2oats ART_BUILD_HOST_STATIC=true
Change-Id: I79b99c4d420caefbdf6aa81541120ddedd2149c5
diff --git a/dex2oat/Android.mk b/dex2oat/Android.mk
index d38cc91..a9d00d3 100644
--- a/dex2oat/Android.mk
+++ b/dex2oat/Android.mk
@@ -65,12 +65,6 @@
   liblog \
   libz \
   libbacktrace \
-  libLLVMObject \
-  libLLVMBitReader \
-  libLLVMMC \
-  libLLVMMCParser \
-  libLLVMCore \
-  libLLVMSupport \
   libcutils \
   libunwindbacktrace \
   libutils \