gdbsupport: replace AC_TRY_COMPILE in warning.m4

Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE + AC_LANG_PROGRAM.

All changes in generated configure files are insignificant whitespace
changes.

gdb/ChangeLog:

	* configure: Re-generate.

gdbserver/ChangeLog:

	* configure: Re-generate.

gdbsupport/ChangeLog:

	* configure: Re-generate.
	* warning.m4: Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE +
	AC_LANG_PROGRAM.

Change-Id: I517bd20ec3af960ad999a586761df0ac8959a3fc
7 files changed