fenv: Move shared x86 sys/fenv.h from x86_64 to shared_x86

drop matching symlink in i386

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

diff --git a/newlib/libc/machine/i386/sys/fenv.h b/newlib/libc/machine/i386/sys/fenv.h
deleted file mode 120000 (symlink)
index 2180578..0000000
--- a/newlib/libc/machine/i386/sys/fenv.h
+++ /dev/null
@@ -1 +0,0 @@
-../../x86_64/sys/fenv.h
\ No newline at end of file

diff --git a/newlib/libc/machine/x86_64/sys/fenv.h b/newlib/libc/machine/shared_x86/sys/fenv.h
similarity index 100%
rename from newlib/libc/machine/x86_64/sys/fenv.h
rename to newlib/libc/machine/shared_x86/sys/fenv.h