Move gdb/selftest.m4 to gdbsupport/selftest.m4

The selftest.m4 file is used by gdb, gdbserver and gdbsupport, I think
it belongs in gdbsupport.

gdb/ChangeLog:

	* selftest.m4: Move to gdbsupport/.
	* acinclude.m4: Update path to selftest.m4.

gdbserver/ChangeLog:

	* acinclude.m4: Update path to selftest.m4.

gdbsupport/ChangeLog:

	* selftest.m4: Moved from gdb/.
	* acinclude.m4: Update path to selftest.m4.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
+
+	* selftest.m4: Move to gdbsupport/.
+	* acinclude.m4: Update path to selftest.m4.
+
 2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
 
 	* Makefile.in (SUBDIR_UNITTESTS_SRCS): Rename to...

gdb/acinclude.m4

@@ -16,7 +16,7 @@ m4_include(../gdbsupport/warning.m4)
 m4_include(sanitize.m4)
 
 # This gets GDB_AC_SELFTEST.
-m4_include(selftest.m4)
+m4_include(../gdbsupport/selftest.m4)
 
 dnl gdb/configure.in uses BFD_NEED_DECLARATION, so get its definition.
 m4_include(../bfd/bfd.m4)

gdbserver/ChangeLog

@@ -1,3 +1,7 @@
+2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
+
+	* acinclude.m4: Update path to selftest.m4.
+
 2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
 
 	* configure.ac: Don't source bfd/development.sh, move

gdbserver/acinclude.m4

@@ -32,7 +32,7 @@ m4_include(../gdb/ptrace.m4)
 m4_include(../gdb/ax_cxx_compile_stdcxx.m4)
 
 dnl For GDB_AC_SELFTEST.
-m4_include(../gdb/selftest.m4)
+m4_include(../gdbsupport/selftest.m4)
 
 m4_include([../config/ax_pthread.m4])
 

gdbsupport/ChangeLog

@@ -1,3 +1,8 @@
+2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
+
+	* selftest.m4: Moved from gdb/.
+	* acinclude.m4: Update path to selftest.m4.
+
 2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
 
 	* configure.ac: Don't source bfd/development.sh.

gdbsupport/Makefile.in

@@ -122,8 +122,7 @@ am__aclocal_m4_deps = $(top_srcdir)/../config/codeset.m4 \
 	$(top_srcdir)/../bfd/bfd.m4 $(top_srcdir)/common.m4 \
 	$(top_srcdir)/../config/ax_pthread.m4 \
 	$(top_srcdir)/../gdb/ax_cxx_compile_stdcxx.m4 \
-	$(top_srcdir)/../gdb/libiberty.m4 \
-	$(top_srcdir)/../gdb/selftest.m4 \
+	$(top_srcdir)/../gdb/libiberty.m4 $(top_srcdir)/selftest.m4 \
 	$(top_srcdir)/../gdb/ptrace.m4 $(top_srcdir)/warning.m4 \
 	$(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \

gdbsupport/acinclude.m4

@@ -3,7 +3,7 @@ m4_include([common.m4])
 m4_include([../config/ax_pthread.m4])
 m4_include([../gdb/ax_cxx_compile_stdcxx.m4])
 m4_include([../gdb/libiberty.m4])
-m4_include([../gdb/selftest.m4])
+m4_include([selftest.m4])
 m4_include([../gdb/ptrace.m4])
 
 dnl This gets AM_GDB_WARNINGS.