Add utimensat and futimens to libc.so at API level 12 and 19, respectively

See ae2d5ba31412c4f382ef405000baa866f35dd736 and
d0be7c8f9a06b3ca8ea7647ea35c8f9dc63f0fe1.

Internal BUG 11590144

Change-Id: I76119cd20fdb205728482e682fd1206d1305881d

Author: Andrew Hsieh

ndk/platforms/android-12/arch-arm/symbols/libc.so.functions.txt

@@ -0,0 +1,51 @@
+_C_ctype_
+_C_tolower_
+_C_toupper_
+__atexit
+__atexit_invalid
+__bionic_brk
+__evOptMonoTime
+__isthreaded
+__libc_malloc_default_dispatch
+__libc_malloc_dispatch
+__p_cert_syms
+__p_class_syms
+__p_default_section_syms
+__p_key_syms
+__p_rcode_syms
+__p_type_syms
+__p_update_section_syms
+__page_shift
+__page_size
+__progname
+__rand48_add
+__rand48_mult
+__rand48_seed
+__sF
+__sFext
+__sdidinit
+__sglue
+__stack_chk_guard
+__system_property_area__
+_ctype_
+_nres
+_ns_flagdata
+_rand48_add
+_rand48_mult
+_rand48_seed
+_res_opcodes
+_tolower_tab_
+_toupper_tab_
+daylight
+environ
+h_errlist
+h_nerr
+optarg
+opterr
+optind
+optopt
+optreset
+sys_siglist
+sys_signame
+timezone
+tzname