* configure.in: Call AC_CONFIG_HEADER. Don't call

* configure.in: Call AC_CONFIG_HEADER.  Don't call
AC_CONFIG_SUBDIRS on gdb.arch, gdb.asm, gdb.base gdb.c++ gdb.java,
gdb.disasm, gdb.mi, gdb.threads and gdb.trace.  Call
AC_CHECK_HEADERS on pthread.h.  Put Makefiles in the
aforementioned directories in the AC_OUPUT call.
* config.hin: New file.
* gdb.mi/gdb669.exp, gdb.mi/mi-pthreads.exp,
gdb.mi/mi1-pthreads.exp, gdb.threads/gcore-thread.exp,
gdb.threads/killed.exp, gdb.threads/print-threads.exp,
gdb.threads/pthreads.exp, gdb.threads/schedlock.exp: Make sure we
pass -I$objdir instead of -I$objdir/$subdir in compilation.
* gdb.arch/configure.in, gdb.arch/configure, gdb.asm/configure.in,
gdb.asm/configure, gdb.base/configure.in, gdb.base/configure,
gdb.c++/configure.in, gdb.c++/configure, gdb.disasm/configure.in,
gdb.disasm/configure, gdb.java/configure.in, gdb.java/configure,
gdb.mi/configure.in, gdb.mi/configure, gdb.mi/config.in,
gdb.threads/configure.in, gdb.threads/configure,
gdb.threads/config.in, gdb.trace/configure.in,
gdb.trace/configure: Removed.