Added clang static libs to libclang host shared library.

Added the libclangRewriteFrontend and libclangRewriteCore static libs to
the libclang shared library. These are required by liblldb when built
with gcc.

Tested:
        make clean && make -j16 FORCE_BUILD_LLVM_COMPONENTS=true libclang
        nm -D --defined-only out/host/linux-x86/lib/libclang.so | grep Rewrite

This should display several symbols as defined in the libclangRewrite*
libs.

Change-Id: I0fe4c1b5784f7da669362ddcf3be87e045e71b09
diff --git a/host_shared_clang.mk b/host_shared_clang.mk
index d4ec63c..f9e4181 100644
--- a/host_shared_clang.mk
+++ b/host_shared_clang.mk
@@ -22,6 +22,8 @@
 	libclangLex \
 	libclangFrontend \
 	libclangBasic \
+	libclangRewriteFrontend \
+	libclangRewriteCore \
 	libclangSerialization
 
 LOCAL_SHARED_LIBRARIES := libLLVM