Simplify tilegx sysdeps folder

With tilepro support removal we can now simplify internal tile support by
moving the directory structure to avoid the unnecessary directory levels
in tile/tilegx both on generic and linux folders.

Checked with a build for tilegx-linux-gnu and tilegx-linux-gnu-32 with
and without the patch, there is no difference in generated binary with
a dissassemble.

	* stdlib/bug-getcontext.c (do_test): Remove tilepro mention in
	comment.
	* sysdeps/tile/preconfigure: Remove tilegx folder.
	* sysdeps/tile/tilegx/Implies: Move definitions to ...
	* sysdeps/tile/Implies: ... here.
	* sysdeps/tile/tilegx/Makefile: Move rules to ...
	* sysdeps/tile/Makefile: ... here.
	* sysdeps/tile/tilegx/atomic-machine.h: Move definitions to ...
	* sysdeps/tile/atomic-machine.h: ... here.  Add include guards.
	* sysdeps/tile/tilegx/bits/wordsize.h: Move to ...
	* sysdeps/tile/bits/wordsize.h: ... here.
	* sysdeps/tile/tilegx/*: Move to ...
	* sysdeps/tile/*: ... here.
	* sysdeps/tile/tilegx/tilegx32/Implies: Move to ...
	* sysdeps/tile/tilegx32/Implies: ... here.
	* sysdeps/tile/tilegx/tilegx64/Implies: Move to ...
	* sysdeps/tile/tilegx64/Implies: ... here.
	* sysdeps/unix/sysv/linux/tile/tilegx/Makefile: Move definitions
	to ...
	* sysdeps/unix/sysv/linux/tile/Makefile: ... here.
	* sysdeps/unix/sysv/linux/tile/tilegx/*: Move to ...
	* sysdeps/unix/sysv/linux/tile/*: ... here.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/*: Move to ...
	* sysdeps/unix/sysv/linux/tile/tilegx32/*: ... here.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/*: Move to ...
	* sysdeps/unix/sysv/linux/tile/tilegx64/*: ... here.

sysdeps/unix/sysv/linux/tile/Makefile

@@ -1,3 +1,8 @@
+# Provide biarch definitions.
+abi-variants := 64 32
+abi-64-condition := __WORDSIZE == 64
+abi-32-condition := __WORDSIZE == 32
+
 ifeq ($(subdir),misc)
 
 # <sys/reg.h> provides something like x86 compatibility.

sysdeps/unix/sysv/linux/tile/configure

@@ -4,7 +4,7 @@
 ldd_rewrite_script=$dir/ldd-rewrite.sed
 
 case $machine in
-tile/tilegx/tilegx32)
+tile/tilegx32)
   test -n "$libc_cv_slibdir" ||
 case "$prefix" in
 /usr | /usr/)

sysdeps/unix/sysv/linux/tile/configure.ac

@@ -4,7 +4,7 @@ GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
 ldd_rewrite_script=$dir/ldd-rewrite.sed
 
 case $machine in
-tile/tilegx/tilegx32)
+tile/tilegx32)
   LIBC_SLIBDIR_RTLDDIR([lib32], [lib32])
   ;;
 esac

sysdeps/unix/sysv/linux/tile/tilegx/Makefile

@@ -1,4 +0,0 @@
-# Provide biarch definitions.
-abi-variants := 64 32
-abi-64-condition := __WORDSIZE == 64
-abi-32-condition := __WORDSIZE == 32

sysdeps/unix/sysv/linux/tile/tilegx32/Implies

@@ -1,4 +1,3 @@
-unix/sysv/linux/tile/tilegx
 unix/sysv/linux/tile
 unix/sysv/linux/generic/wordsize-32
 unix/sysv/linux/generic

sysdeps/unix/sysv/linux/tile/tilegx64/Implies

@@ -1,4 +1,3 @@
-unix/sysv/linux/tile/tilegx
 unix/sysv/linux/tile
 unix/sysv/linux/generic
 unix/sysv/linux/wordsize-64