kc3-lang/harfbuzz

2018-10-04T09:17:08

Minor: Fix autoconf warning Before this change, autoconf was emitting the following warnings: ``` configure.ac:22: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level ```