Merge changes I31ddaf44,I07c99308

* changes:
  Add missing symbols to android-17 libc
  Copy libc.so symbols from android-16 to 17

Author: dimitry-

ndk/platforms/android-17/arch-arm/symbols/libc.so.functions.txt

@@ -0,0 +1,21 @@
+__isthreaded
+__p_class_syms
+__p_type_syms
+__progname
+__sF
+__stack_chk_guard
+__system_property_area__
+_ctype_
+_tolower_tab_
+_toupper_tab_
+daylight
+environ
+optarg
+opterr
+optind
+optopt
+optreset
+sys_siglist
+sys_signame
+timezone
+tzname