Fix build error when building a shared libunistring on Android. * tests/uninorm/test-nfc.c (n): Don't define on Android. (main): Add 'volatile', to defeat a GCC optimization that would eliminate the reference. * tests/uninorm/test-nfd.c (n): Don't define on Android. (main): Add 'volatile', to defeat a GCC optimization that would eliminate the reference. * tests/uninorm/test-nfkc.c (n): Don't define on Android. (main): Add 'volatile', to defeat a GCC optimization that would eliminate the reference. * tests/uninorm/test-nfkd.c (n): Don't define on Android. (main): Add 'volatile', to defeat a GCC optimization that would eliminate the reference.

Files:
tests/test-setlocale1.sh
tests/test-setlocale1.c
tests/test-setlocale2.sh
tests/test-setlocale2.c
tests/signature.h
tests/macros.h
m4/locale-fr.m4
m4/locale-ja.m4
m4/locale-zh.m4
m4/codeset.m4

Depends-on:
strdup

configure.ac:
gt_LOCALE_FR
gt_LOCALE_FR_UTF8
gt_LOCALE_JA
gt_LOCALE_ZH_CN

Makefile.am:
TESTS += test-setlocale1.sh test-setlocale2.sh
TESTS_ENVIRONMENT += \
  LOCALE_FR='@LOCALE_FR@' \
  LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
  LOCALE_JA='@LOCALE_JA@' \
  LOCALE_ZH_CN='@LOCALE_ZH_CN@'
check_PROGRAMS += test-setlocale1 test-setlocale2