Use liblzma as shared library instead of static.

Change-Id: Ic9a01546d35fcb88130517645009daf76dfc8583
diff --git a/Android.mk b/Android.mk
index eb44edc..0704164 100644
--- a/Android.mk
+++ b/Android.mk
@@ -226,7 +226,7 @@
 libunwind_src_files_mips  += src/elf32.c
 libunwind_src_files_x86   += src/elf32.c
 
-libunwind_static_libraries := liblzma
+libunwind_shared_libraries += liblzma
 
 libunwind_shared_libraries_target := \
     libdl \